Comparing Timelines
Exploring the overlapping histories of "United Nations" and "Cold War".
United Nations
1920 - 2026
Cold War
1945 - 1991
1920 CE
League of Nations Formally Established
The League of Nations formally came into being when the Covenant of the League of Nations, ratified by 42 nations in 1919, took effect. The League Council acted as an executive body directing the Assembly's business, beginning with four permanent members—the United Kingdom, France, Italy, and Japan.
1941 CE
Declaration of St James's Palace
The first step towards the establishment of the United Nations was the Inter-Allied Conference in London that led to the Declaration of St James's Palace. This declaration marked the beginning of Allied cooperation that would eventually lead to the UN's formation.
Atlantic Charter Drafted
American president Franklin Roosevelt and British prime minister Winston Churchill drafted the Atlantic Charter, which defined goals for the post-war world. This document became a foundational text for the future United Nations organization.
1942 CE
Declaration by United Nations Signed
Roosevelt, Churchill, the Soviet Union's former Foreign Minister Maxim Litvinov, and the Chinese Premier T. V. Soong signed the 'Declaration by United Nations', with representatives of twenty-two other nations adding their signatures the next day. This marked the first official use of the term 'United Nations'.
1943 CE
Moscow Conference and Four Power Declaration
The October 1943 Moscow Conference resulted in the Moscow Declarations, including the Four Power Declaration on General Security. This was the first public announcement that a new international organization was being contemplated to replace the League of Nations.
1944 CE
Dumbarton Oaks Conference
The new international organization was formulated and negotiated amongst the delegations from the Allied Big Four at the Dumbarton Oaks Conference. They agreed on proposals for the aims, structure and functioning of the new organization that would become the United Nations.
1945 CE
UN Conference on International Organization Opens
After months of planning, the UN Conference on International Organization opened in San Francisco. It was attended by 50 nations' governments and a number of non-governmental organizations, with the delegations of the Big Four chairing the plenary meetings.
UN Charter Signed
The Charter of the United Nations was signed by the representatives of the 50 countries after two months of drafting. This document established the legal foundation for the United Nations organization and its operations.
The UN in 1945: founding members in light blue, protectorates and territories of the founding members in dark blue
Map showing the founding members of the United Nations in 1945
United Nations Officially Established
The UN officially came into existence at 20:07 (UTC) upon ratification of the Charter by the five permanent members of the Security Council and by a majority of the other 46 nations. This marked the birth of the modern international organization system.
End of World War II
The Second World War ended, setting the stage for the Cold War as former allies the US and USSR began to diverge in their post-war visions. This marked the beginning of tensions that would define the next four decades of international relations.
George Orwell Coins 'Cold War' Term
Writer George Orwell used the term 'cold war' in his essay 'You and the Atomic Bomb', contemplating a world living under the threat of nuclear warfare. This early usage helped establish the terminology that would define the era.
1946 CE
First UN General Assembly and Security Council Meetings
The first meetings of the General Assembly, with 51 nations represented, and the Security Council took place in London. Debates began at once, covering topical issues such as the presence of Russian troops in Iranian Azerbaijan and British forces in Greece.
George Kennan's Long Telegram
George F. Kennan's 'Long Telegram' from Moscow to Washington articulated the US government's increasingly hard line against the Soviets. This telegram galvanized policy debate and became the basis for US strategy toward the Soviet Union, laying groundwork for the containment doctrine.
Churchill's Iron Curtain Speech
Former British Prime Minister Winston Churchill delivered his famous 'Iron Curtain' speech, calling for an Anglo-American alliance against the Soviets and accusing them of establishing an 'iron curtain' dividing Europe. This speech marked a public acknowledgment of the growing East-West divide.
Remains of the Iron Curtain in the Czech Republic, 2014
Physical remnants of the barrier that divided Europe during the Cold War
Stalin Responds to Churchill
Stalin responded vigorously to Churchill's Iron Curtain speech, comparing Churchill to Adolf Hitler and calling the speech 'a call for war on the USSR.' This exchange marked the beginning of public Cold War rhetoric between East and West.
1947 CE
UN General Assembly Resolution 181 - Palestine Partition Plan
The General Assembly approved Resolution 181, a proposal to partition British Mandatory Palestine into two states, a Jewish state and an Arab state, with Jerusalem placed under international status. The plan passed 33–13 with 10 abstentions, leading to civil war.
National Security Act Signed
President Truman signed the National Security Act of 1947, creating a unified Department of Defense, the Central Intelligence Agency (CIA), and the National Security Council (NSC). These institutions became the main bureaucracies for US defense policy during the Cold War.
Truman Doctrine Announced
President Harry S. Truman announced the Truman Doctrine, marking the beginning of US containment policy. Truman called for $400 million to intervene in Greece's civil war and framed the conflict as a contest between free peoples and totalitarian regimes, establishing a bipartisan foreign policy consensus.
Bernard Baruch First Uses 'Cold War' for US-Soviet Confrontation
Bernard Baruch, an influential advisor to Democratic presidents, first used the term 'cold war' to describe the specific post-war geopolitical confrontation between the Soviet Union and United States. His speech proclaimed 'we are today in the midst of a cold war.'
Marshall Plan Enacted
The United States enacted the Marshall Plan, pledging economic assistance for all European countries willing to participate. This $13 billion program aimed to rebuild democratic and economic systems in Europe while countering perceived communist threats.
The labeling used on the Marshall Plan economic aid to Western Europe
Official logo of the Marshall Plan aid program
Cominform Created
The Soviets created Cominform to impose orthodoxy within the international communist movement and tighten political control over Soviet satellites through coordination of communist parties in the Eastern Bloc. This represented the Soviet response to Western alliance-building.
1948 CE
Universal Declaration of Human Rights Adopted
The General Assembly adopted the Universal Declaration of Human Rights, drafted by a committee headed by American diplomat and activist Eleanor Roosevelt. The document proclaimed basic civil, political and economic rights common to all human beings.
Eleanor Roosevelt with the Universal Declaration of Human Rights, 1949
Eleanor Roosevelt holding the Universal Declaration of Human Rights
UN Headquarters Construction Begins
Construction began on the UN headquarters in New York City after the General Assembly selected the city as the site for the headquarters. The facility would be completed on October 9, 1952, establishing the permanent home of the United Nations.
Czechoslovak Communist Coup
Czech Communists executed a coup d'état in Czechoslovakia, forming the Czechoslovak Socialist Republic. This was the only Eastern Bloc state the Soviets had permitted to retain democratic structures, and the brutal coup shocked Western powers more than any previous event.
Marshall Plan Signed into Law
President Harry S. Truman officially signed the Marshall Plan into law, authorizing over $13 billion in aid to Western European countries. This massive economic assistance program was designed to rebuild Europe and prevent the spread of communism.
Construction in West Berlin under Marshall Plan aid
Example of reconstruction efforts funded by Marshall Plan assistance
Berlin Blockade Begins
Stalin instituted the Berlin Blockade, preventing Western supplies from reaching West Berlin. This was one of the first major crises of the Cold War, prompting the massive Berlin Airlift by the United States, Britain, France, and other allies to supply the city despite Soviet threats.
American C-47s unloading at the Berlin Tempelhof Airport during the Berlin Blockade
Aircraft delivering supplies during the Berlin Airlift
Berlin Municipal Elections
Berlin municipal elections were held with 86% turnout and overwhelming victory for non-communist parties, effectively dividing the city into East and West. The results demonstrated popular rejection of communist control and strengthened Western resolve.
1949 CE
People's Republic of China Founded
Mao Zedong's People's Liberation Army defeated Chiang Kai-shek's US-backed Kuomintang, establishing the People's Republic of China. The Kremlin promptly created an alliance with the newly formed communist state, significantly expanding the communist bloc.
Mao Zedong and Joseph Stalin in Moscow, December 1949
Meeting between communist leaders cementing the Sino-Soviet alliance
Radio Free Europe Begins
A major propaganda effort began with Radio Free Europe/Radio Liberty, dedicated to bringing about the peaceful demise of the communist system in the Eastern Bloc. This represented a key component of the ideological battle of the Cold War.
NATO Founded
Britain, France, the United States, Canada and eight other western European countries signed the North Atlantic Treaty, establishing NATO. This military alliance was designed to counter Soviet influence and provide collective security for Western nations.
President Truman signs the North Atlantic Treaty with guests in the Oval Office
Historic signing ceremony establishing NATO
Federal Republic of Germany Established
The US, Britain and France established the Federal Republic of Germany from the three Western zones of occupation. This formalized the division of Germany and represented a key step in the institutionalization of the Cold War divide in Europe.
Berlin Blockade Ends
Stalin lifted the Berlin Blockade after nearly a year, ending the first major Cold War crisis. The successful Berlin Airlift demonstrated Western resolve and firmly linked West Berlin to the United States, marking a significant early victory for the West.
Soviet Union Tests First Nuclear Weapon
The first Soviet atomic device was detonated in Semipalatinsk, Kazakh SSR, ending the American nuclear monopoly. This development dramatically escalated the Cold War and began the nuclear arms race between the superpowers.
German Democratic Republic Proclaimed
The Soviet Union proclaimed its zone of occupation in Germany the German Democratic Republic, completing the formal division of Germany into East and West. This institutionalized the partition that would last until 1990.
1950 CE
Korean War Authorization
A Security Council resolution authorized a US-led coalition to repel the North Korean invasion of South Korea. This resolution was passed in the absence of the Soviet Union, demonstrating how Cold War tensions affected UN operations.
NSC 68 Document
The National Security Council produced NSC 68, a secret document proposing reinforcing pro-Western alliance systems and quadrupling defense spending. This document escalated and expanded the containment doctrine in response to the communist revolution in China and end of American atomic monopoly.
Korean War Begins
Kim Il Sung's North Korean People's Army invaded South Korea, beginning the Korean War. This became one of the most significant examples of Cold War containment policy implementation, with UN forces led by the US intervening to defend South Korea.
General Douglas MacArthur observes naval shelling of Incheon, Korea
UN Command operations during the Korean War
1952 CE
UN Headquarters Completed
The UN headquarters facility in New York City was completed, providing a permanent home for the organization's operations. The building became an iconic symbol of international cooperation and diplomacy.
1953 CE
Korean Armistice Agreement Signed
The Korean Armistice Agreement was signed, ending active hostilities in the Korean War. This demonstrated the UN's role in conflict resolution and peacekeeping, though the war technically never ended with a peace treaty.
Joseph Stalin Dies
Joseph Stalin died, leading to changes in Soviet leadership that shifted the dynamic of the Cold War. Nikita Khrushchev eventually won the ensuing power struggle by the mid-1950s and began a process of de-Stalinization.
Dwight D. Eisenhower Inaugurated
Dwight D. Eisenhower was inaugurated as US President, bringing new leadership to American Cold War strategy. Eisenhower moved to reduce military spending while continuing to fight the Cold War effectively, introducing the 'New Look' strategy.
Operation Ajax in Iran
President Eisenhower implemented Operation Ajax, a covert CIA coup operation to overthrow Iranian Prime Minister Mohammad Mosaddegh. The operation installed the pro-Western Shah Mohammad Reza Pahlavi, demonstrating US willingness to intervene covertly in Third World countries.
Korean Armistice Agreement
The Korean Armistice Agreement was approved, ending active hostilities in the Korean War. The war ended in stalemate with minimal border changes, demonstrating both the limits of military force in the Cold War and the effectiveness of containment policy.
1954 CE
Guatemalan Coup
The CIA supported a coup d'état that ousted left-wing Guatemalan President Jacobo Árbenz. The post-coup military junta reversed progressive land reforms and established anti-communist measures, demonstrating US intervention in Latin America during the Cold War.
1955 CE
Warsaw Pact Established
The Soviet Union established the Warsaw Pact as a formal military alliance of Eastern Bloc countries, standing in opposition to NATO. This completed the division of Europe into two opposing military blocs and institutionalized the Cold War military confrontation.
Bundeswehr Established
The West German military, the Bundeswehr, was established as part of West Germany's rearmament and full NATO membership. This represented the rehabilitation of German military power within the Western alliance framework.
Generals Adolf Heusinger and Hans Speidel sworn into the newly founded Bundeswehr
Ceremony establishing the West German military
Bandung Conference
At the Bandung Conference in Indonesia, dozens of Third World governments resolved to stay out of the Cold War. This conference led to the creation of the Non-Aligned Movement and represented an alternative to choosing sides in the East-West competition.
1956 CE
First UN Peacekeeping Force Established
The first UN peacekeeping force was established to end the Suez Crisis. However, the UN was unable to intervene against the Soviet Union's simultaneous invasion of Hungary, highlighting the limitations of UN action during the Cold War.
Khrushchev Denounces Stalin
Nikita Khrushchev denounced Joseph Stalin and proceeded to ease controls over the party and society in a process known as de-Stalinization. This marked a significant shift in Soviet domestic and foreign policy approach.
Hungarian Revolution
The Hungarian Revolution occurred as a popular anti-communist uprising. The new regime disbanded secret police and pledged to withdraw from the Warsaw Pact, but the Soviet Army invaded, killing thousands and crushing the revolution. This demonstrated the limits of Soviet tolerance for reform.
Hungarian flag with communist coat of arms cut out
Symbol of anti-Soviet revolutionary sentiment during the Hungarian Revolution
Suez Crisis
During the Suez Crisis, Eisenhower used American nuclear superiority to face down Soviet threats to intervene in the Middle East. This demonstrated how nuclear weapons could be used as diplomatic leverage during international crises.
Khrushchev's 'We Will Bury You' Declaration
While addressing Western dignitaries in Moscow, Khrushchev infamously declared 'Whether you like it or not, history is on our side. We will bury you,' shocking everyone present. He later claimed this referred to the historically fated victory of communism over capitalism, not nuclear war.
Soviet leaders Voroshilov, Khrushchev, and Finnish president Kekkonen
Diplomatic meeting showing Khrushchev's international engagement
1957 CE
Rapacki Plan Proposed
Polish foreign minister Adam Rapacki proposed the Rapacki Plan for a nuclear-free zone in central Europe. While public opinion was favorable in the West, leaders of West Germany, Britain, France and the US rejected it, fearing it would leave Warsaw Pact conventional armies dominant.
First ICBM and Sputnik Launch
The Soviets successfully launched the world's first intercontinental ballistic missile in August, followed by the first Earth satellite, Sputnik 1, in October. These achievements led to the Sputnik crisis and inaugurated the Space Race between the superpowers.
Space Race milestones including Sputnik 1 and Apollo 11
Key achievements in the Cold War space competition
1958 CE
Berlin Crisis of 1958-1959
Khrushchev made an unsuccessful attempt to turn all of Berlin into an independent, demilitarized 'free city,' giving Western powers a six-month ultimatum to withdraw troops. NATO rejected the ultimatum, and Khrushchev withdrew it in return for a Geneva conference.
1959 CE
Cuban Revolution Victory
The 26th of July Movement, led by Fidel Castro and Che Guevara, seized power in Cuba. Although Castro initially refused to categorize his government as socialist, he appointed Marxists to senior positions, eventually bringing the first communist regime to the Western Hemisphere.
Che Guevara and Fidel Castro in 1961
Leaders of the Cuban Revolution
Khrushchev Visits United States
Khrushchev made a two-week visit to the United States as part of an upswing in diplomacy. This visit, along with plans for a summit in 1960, represented substantial hopes for détente, though these were later disrupted by the U-2 spy plane incident.
1960 CE
UN Operation in the Congo Established
The UN established the United Nations Operation in the Congo (UNOC), the largest military force of its early decades, to bring order to Katanga and restore it to the control of the Democratic Republic of the Congo. The operation lasted until May 11, 1964.
U-2 Spy Plane Incident
The U-2 spy plane scandal disrupted planned US-Soviet summit talks when Eisenhower was caught lying about American surveillance aircraft intrusions into Soviet territory. This incident damaged prospects for improved relations and demonstrated the fragility of détente efforts.
Congo Crisis Begins
The Congo Crisis erupted in the newly independent Republic of the Congo, leading to CIA-backed interventions. President Joseph Kasa-Vubu dismissed Prime Minister Patrice Lumumba, and Colonel Mobutu Sese Seko seized power through a military coup, with Lumumba eventually executed.
1961 USSR stamp commemorating Patrice Lumumba
Soviet commemoration of the assassinated Congolese leader
1961 CE
Dag Hammarskjöld Dies in Plane Crash
UN Secretary-General Dag Hammarskjöld, often named as one of the UN's most effective secretaries-general, died in a plane crash while travelling to meet rebel leader Moise Tshombe during the Congo conflict. He was posthumously awarded the Nobel Peace Prize months later.
Dag Hammarskjöld was a particularly active secretary-general from 1953 until he died in 1961.
Portrait of Dag Hammarskjöld, the second UN Secretary-General
Sino-Soviet Split Becomes Official
The Sino-Soviet split became official, bringing the two communist states to the brink of war. This fundamental break in the communist bloc significantly altered Cold War dynamics and created opportunities for US diplomatic initiatives with China.
Non-Aligned Movement Founded
The Belgrade-headquartered Non-Aligned Movement was created, culminating the consensus reached at the 1955 Bandung Conference. This movement provided an alternative to choosing sides in the Cold War for newly independent nations.
Bay of Pigs Invasion
The Kennedy administration mounted an unsuccessful CIA-organized invasion of Cuba by Cuban exiles at Playa Girón and Playa Larga. This failure publicly humiliated the United States and pushed Castro to publicly embrace Marxism-Leninism and seek Soviet support.
Berlin Wall Constructed
East Germany erected a barbed-wire barrier that would eventually become the Berlin Wall, effectively closing the loophole that allowed East Germans to flee to the West. This became the most visible symbol of the Cold War division of Europe.
Soviet and American tanks face each other at Checkpoint Charlie
Tense confrontation during the Berlin Crisis of 1961
1962 CE
Cuban Missile Crisis
The Cuban Missile Crisis brought the world closer to nuclear war than ever before. Kennedy responded to Soviet nuclear missiles in Cuba with a naval blockade and ultimatum. Khrushchev backed down, removing missiles in exchange for a US pledge not to invade Cuba and secret removal of US missiles from Turkey.
Aerial photograph of a Soviet missile site in Cuba
US spy aircraft photograph revealing Soviet missile installations
1963 CE
Partial Nuclear Test Ban Treaty
The Partial Nuclear Test Ban Treaty was signed by the United States, Soviet Union, and over 100 other nations. This treaty banned nuclear weapons tests in the atmosphere, outer space, and underwater, restricting tests to underground environments.
1964 CE
Khrushchev Ousted
Khrushchev's Kremlin colleagues managed to oust him, allowing him a peaceful retirement. He was accused of rudeness, incompetence, ruining Soviet agriculture, bringing the world to the brink of nuclear war, and becoming an international embarrassment with the Berlin Wall.
Vietnam War Escalation
Following the Gulf of Tonkin incident, President Lyndon B. Johnson received broad authorization to increase US military presence in Vietnam, deploying ground combat units and increasing troop levels to 184,000. This marked major escalation of US involvement in the Vietnam conflict.
US combat operations during the Battle of Ia Drang, South Vietnam
American military operations in the Vietnam War
1967 CE
Glassboro Summit
Soviet Premier Alexei Kosygin met with US President Lyndon B. Johnson at the Glassboro Summit Conference. This meeting represented continued efforts at dialogue and détente between the superpowers despite ongoing tensions over Vietnam and other issues.
Soviet Premier Alexei Kosygin with US President Lyndon B. Johnson
Summit meeting between superpower leaders
Outer Space Treaty Signed
The Treaty on Principles Governing the Activities of States in the Exploration and Use of Outer Space was signed by the United States, Soviet Union, and United Kingdom. The treaty established space as a domain for peaceful purposes only, prohibiting nuclear weapons in orbit.
1968 CE
Tet Offensive
The Tet Offensive proved to be the turning point of the Vietnam War. Despite years of American aid, South Vietnamese forces were unable to withstand the communist offensive, and the task fell to US forces, demonstrating the limitations of the US strategy.
Prague Spring and Soviet Invasion
A period of political liberalization in Czechoslovakia called the Prague Spring included reforms for press freedom, speech, movement, and potential Warsaw Pact withdrawal. On August 20, the Soviet Army and Warsaw Pact allies invaded, crushing the reforms and causing massive emigration.
The invasion of Czechoslovakia by the Soviet Union in 1968
One of the biggest military operations in Europe since World War II
1969 CE
Sino-Soviet Border Conflict
Tensions along the Chinese-Soviet border reached their peak with a border conflict that brought the two communist states to the brink of war. This conflict demonstrated the complete breakdown of the Sino-Soviet alliance and created opportunities for US diplomacy.
1971 CE
People's Republic of China Joins UN Security Council
With opposition from the United States but support from many Third World nations, the People's Republic of China was given the Chinese seat on the Security Council in place of the Republic of China (Taiwan). The vote was widely seen as a sign of waning American influence in the organization.
1972 CE
Nixon Visits China
US President Richard Nixon made his historic visit to China, beginning a policy of rapprochement that shifted the balance of power in the Cold War toward the West. This diplomatic breakthrough exploited the Sino-Soviet split to American advantage.
Nixon shakes hands with Chinese Premier Zhou Enlai
Historic diplomatic breakthrough between US and China
Strategic Arms Limitation Talks (SALT I)
Nixon met with Soviet leaders in Moscow for Strategic Arms Limitation Talks, resulting in landmark arms control treaties. These aimed to limit the development of costly anti-ballistic missiles and nuclear missiles, establishing a new era of 'peaceful coexistence.'
1973 CE
1973 Oil Crisis
The Organization of Petroleum Exporting Countries (OPEC) cut petroleum output, raising oil prices and hurting Western economies while helping the Soviet Union through increased oil sales revenue. This demonstrated the growing influence of Third World alignments.
1975 CE
Zionism Declared Form of Racism
A bloc comprising the Soviet Union and Third World nations passed a resolution, over strenuous American and Israeli opposition, declaring Zionism to be a form of racism. The resolution was later repealed on December 16, 1991, shortly after the end of the Cold War.
Helsinki Accords Signed
The Helsinki Accords were signed at the Conference on Security and Co-operation in Europe, with the Soviets promising to grant free elections in Europe. These agreements were part of efforts to stabilize the situation in Europe and represented a major concession by the Soviets.
Vietnam War Ends
The Vietnam War ended in defeat for the United States after lasting from 1955 to 1975. This major proxy conflict demonstrated the limits of American military power and led to a decline in US international prestige, contributing to a policy of détente.
1979 CE
Iranian Revolution
The Iranian Revolution toppled the US-allied Shah, installing an anti-American Islamic regime. This event, along with the Nicaraguan Revolution, represented major setbacks for US influence and contributed to the deterioration of détente with the Soviet Union.
Iranian people protesting against the Pahlavi dynasty
Popular uprising that overthrew the US-allied Shah
SALT II Treaty Signed
Soviet General Secretary Leonid Brezhnev and US President Jimmy Carter signed the SALT II arms limitation treaty in Vienna. However, Carter's efforts were undermined by other events including the Iranian Revolution and Soviet invasion of Afghanistan.
Brezhnev and Carter sign the SALT II treaty
Arms control agreement between the superpowers
Soviet Invasion of Afghanistan
Soviet special forces assassinated Afghan President Hafizullah Amin during Operation Storm-333 and installed Babrak Karmal as his successor. Soviet troops were deployed in substantial numbers, directly involving the USSR in what had been a domestic Afghan conflict.
The Soviet invasion during Operation Storm-333
Map showing Soviet military operations in Afghanistan
1980 CE
Smallpox Eradication Announced
The World Health Organization announced that the eradication of smallpox had been completed, marking one of the UN's greatest public health achievements. This demonstrated the effectiveness of coordinated international health efforts.
Three former directors of the Global Smallpox Eradication Programme reading the news that smallpox has been globally eradicated in 1980
Three directors celebrating the global eradication of smallpox
Carter's Response to Soviet Invasion
Carter responded to the Soviet invasion of Afghanistan by withdrawing the SALT II treaty, imposing embargoes, demanding increased military spending, and announcing a boycott of the 1980 Moscow Olympics. He called it 'the most serious threat to peace since World War II.'
Ronald Reagan Elected President
Ronald Reagan won the 1980 presidential election, vowing to increase military spending and confront the Soviets everywhere. Reagan labeled the Soviet Union an 'evil empire' and predicted that Communism would be left on the 'ash heap of history.'
World map of military alliances in 1980
Global alignment of forces at the start of Reagan's presidency
1981 CE
Reagan Military Buildup
Reagan accelerated military spending from 5.3% of GNP in 1981 to 6.5% in 1986, the largest peacetime defense buildup in US history. He revived the B-1 bomber, produced Peacekeeper missiles, installed cruise missiles in Europe, and announced the Strategic Defense Initiative.
US and USSR nuclear weapons stockpiles, 1945-2006
Chart showing the nuclear arms race between superpowers
Polish Martial Law
Poland's Wojciech Jaruzelski imposed martial law in response to the Solidarity movement crisis. Reagan imposed economic sanctions on Poland in response, while the Kremlin advised against intervention for fear of economic catastrophe.
Protest in Amsterdam against deployment of Pershing II missiles
European opposition to nuclear weapons deployment
1983 CE
Reagan Meets Afghan Mujahideen
President Reagan publicized his support by meeting with Afghan mujahideen leaders in the White House, demonstrating US backing for Islamic opponents of the Soviet Union and Soviet-backed PDPA government in Afghanistan.
President Reagan with Afghan mujahideen leaders
US support for anti-Soviet forces in Afghanistan
Korean Air Lines Flight 007 Shot Down
The Soviet Union shot down Korean Air Lines Flight 007, a Boeing 747 with 269 people aboard, including US Congressman Larry McDonald. Reagan characterized this as a massacre, and the incident increased support for military deployment and heightened tensions.
USSR stamp featuring Samantha Smith
Soviet stamp honoring American girl who wrote to Andropov about nuclear war fears
Able Archer 83 Exercise
The Able Archer 83 NATO exercise in November was a realistic simulation of coordinated nuclear release that Soviet leadership feared might be cover for an actual attack. This was perhaps the most dangerous moment since the Cuban Missile Crisis.
1985 CE
Mikhail Gorbachev Becomes Soviet Leader
Mikhail Gorbachev became General Secretary of the Soviet Union and began expanding political freedoms. His reforms of perestroika and glasnost contributed to the revolutions of 1989 in the Eastern Bloc and ultimately the collapse of the USSR.
Gorbachev in discussions with Reagan
New Soviet leader engaging with US President
Geneva Summit
The first Reagan-Gorbachev summit was held in Geneva, Switzerland, marking the beginning of renewed dialogue between the superpowers. This meeting initiated a series of summits that would lead to significant arms control agreements.
1986 CE
Reykjavik Summit
A second Reagan-Gorbachev summit was held in Reykjavik, Iceland. Talks went well until focus shifted to Reagan's Strategic Defense Initiative, which Gorbachev wanted eliminated. Reagan refused, and negotiations failed, but groundwork was laid for future agreements.
1987 CE
Gorbachev Announces Perestroika
Gorbachev announced perestroika (restructuring), an agenda of economic reform that relaxed production quotas, allowed cooperative ownership of small businesses, and paved the way for foreign investment. This was intended to redirect resources from military to civilian sectors.
Reagan's 'Tear Down This Wall' Speech
President Reagan delivered his famous speech at the Brandenburg Gate, demanding 'Mr. Gorbachev, tear down this wall!' This speech became an iconic moment in Cold War rhetoric and symbolized Western pressure for change in the Soviet system.
Reagan speaking in front of the Brandenburg Gate
Historic speech demanding the removal of the Berlin Wall
INF Treaty Signed
The Washington Summit led to the signing of the Intermediate-Range Nuclear Forces Treaty (INF), eliminating all nuclear-armed, ground-launched ballistic and cruise missiles with ranges between 500-5,500 kilometers and their infrastructure.
Gorbachev and Reagan sign the INF Treaty
Historic arms control agreement between superpowers
1989 CE
Soviet Withdrawal from Afghanistan
Soviet forces withdrew from Afghanistan without achieving their objectives, ending a costly nine-year intervention. This withdrawal demonstrated the limits of Soviet military power and contributed to the decline of Soviet influence globally.
Revolutions of 1989
The 1989 revolutionary wave swept across Central and Eastern Europe, peacefully overthrowing Soviet-style governments in East Germany, Poland, Hungary, Czechoslovakia, and Bulgaria. Romania was the only country to topple its regime violently.
East German leader Erich Honecker
Communist leader who lost control during the 1989 revolutions
Pan-European Picnic
The Pan-European Picnic took place on the Hungarian-Austrian border, starting a peaceful movement that Eastern Bloc rulers could not stop. This event led to the largest movement of refugees from East Germany since 1961 and ultimately brought about the fall of the Iron Curtain.
The Pan-European Picnic memorial site
Location of the event that helped bring down the Iron Curtain
Baltic Way Human Chain
A human chain formed in Lithuania during the Baltic Way demonstration, as Baltic states began their independence movements. This peaceful protest symbolized the growing desire for freedom from Soviet control in the Baltic republics.
The human chain in Lithuania during the Baltic Way
Peaceful demonstration for Baltic independence
Fall of the Berlin Wall
The Berlin Wall fell in November 1989, symbolizing the collapse of European communist governments and graphically ending the Iron Curtain divide of Europe. This event marked the beginning of German reunification and the end of the Cold War division.
Malta Summit - Cold War Declared Over
Gorbachev and Bush declared the Cold War over at the Malta Summit. This meeting officially marked the end of the ideological and geopolitical confrontation that had defined international relations for over four decades.
The beginning of the 1990s brought a thaw in relations
Bush and Gorbachev meeting as the Cold War ended
1990 CE
Lithuania Declares Independence
Lithuania declared its independence restored, citing the illegality of Soviet occupation of the Baltic states. This was the first Soviet republic to declare independence, beginning the process of Soviet dissolution.
German Reunification Treaty
Gorbachev agreed to the Treaty on the Final Settlement with Respect to Germany, paving the way for German reunification. This formally ended the post-war division of Germany and represented a major victory for Western diplomacy.
1991 CE
Gulf War Coalition Authorized
The UN authorized a US-led coalition that repulsed Iraq's invasion of Kuwait. This marked a significant post-Cold War use of UN authority to authorize military action against aggression.
Zionism-Racism Resolution Repealed
The controversial 1975 resolution declaring Zionism to be a form of racism was repealed, shortly after the end of the Cold War. This reflected changing geopolitical dynamics and improved relations between various UN member states.
START I Treaty Signed
During the final summit in Moscow, Gorbachev and Bush signed the START I arms control treaty, representing continued cooperation between the superpowers even as the Soviet Union was dissolving.
August Coup Attempt
Hardline members of the Soviet government and KGB attempted a coup to reverse Gorbachev's reforms and reassert central control. The coup collapsed, effectively ending Gorbachev's power and accelerating the dissolution of the Soviet Union.
August Coup in Moscow, 1991
Failed coup attempt that accelerated Soviet collapse
Soviet Union Dissolves
The USSR officially dissolved on December 25, 1991, when Gorbachev resigned as President. Fifteen independent states emerged, with Russia assuming the Soviet Union's UN membership, nuclear stockpile, and international obligations, formally ending the Cold War.
The first Russian McDonald's on Moscow's Pushkin Square
Symbol of Western capitalism entering the former Soviet Union
1994 CE
Trusteeship Council Suspends Operations
The Trusteeship Council, one of the six principal organs established by the UN Charter, suspended its operations upon the independence of Palau, the last remaining UN trustee territory. This marked the end of the UN trusteeship system.
1999 CE
Kosovo Force Authorized
United Nations Security Council Resolution 1244 authorized the NATO-led Kosovo Force beginning in 1999. This represented a new form of international intervention in the post-Cold War era.
2000 CE
Millennium Summit and Development Goals
The Millennium Summit was held to discuss the UN's role in the 21st century. The three-day meeting was the largest gathering of world leaders in history, culminating in the adoption of the Millennium Development Goals (MDGs) by all member states.
2001 CE
UN and Kofi Annan Win Nobel Peace Prize
The UN as a whole was awarded the Nobel Peace Prize, sharing it with Secretary-General Kofi Annan. This recognition highlighted the organization's contributions to international peace and security.
The 2001 Nobel Peace Prize to the UN—diploma in the lobby of the UN Headquarters in New York City
Nobel Peace Prize diploma awarded to the United Nations in 2001
2010 CE
Haiti Earthquake Kills 101 UN Personnel
The organization suffered the worst loss of life in its history when 101 personnel died in the Haiti earthquake. This tragedy highlighted the risks faced by UN personnel in humanitarian operations.
2011 CE
South Sudan Joins UN
South Sudan joined the United Nations, becoming the most recent addition and bringing the total to 193 UN member states. This marked the end of a long process of independence and international recognition.
2015 CE
Sustainable Development Goals Launched
The Sustainable Development Goals (SDGs) were launched to succeed the Millennium Development Goals. These 17 goals represented a comprehensive agenda for global development and environmental sustainability through 2030.
2017 CE
António Guterres Becomes Secretary-General
Portuguese diplomat António Guterres, who had previously served as the UN High Commissioner for Refugees, became the ninth secretary-general. He emphasized diplomacy for preventing conflicts, more effective peacekeeping efforts, and streamlining the organization.
António Guterres, the current secretary-general
Portrait of António Guterres, the ninth UN Secretary-General
2019 CE
UN-World Economic Forum Partnership
The UN signed a Strategic Partnership Framework with the World Economic Forum to 'jointly accelerate' the implementation of the 2030 Agenda for Sustainable Development. This partnership aimed to leverage private sector engagement in global development goals.
2025 CE
UN Financial Crisis Deepens
The UN began facing a severe financial crisis resulting from delays in member state due payments and refusal to pay assessed amounts. Only 61 countries paid their dues on time and in full, causing massive budget cuts and putting millions of lives at risk.
2026 CE
Guterres Warns of 'Imminent Financial Collapse'
Secretary-General Guterres sent a letter to all members warning of an 'imminent financial collapse' of the UN. This represented the culmination of ongoing financial difficulties that had been building since 2020.