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Yalta Conference
The Yalta Conference was a World War II meeting between the heads of state of the United States, Great Britain, and the Soviet Union. Roosevelt, Churchill, and Stalin met in February, 1945 at Yalta, in the Crimea, to plan the occupation of postwar Germany. -
President Franklin D. Roosevelt dies
While on a vacation in Warm Springs, Georgia, President Roosevelt suffers a stroke and dies. His death marked a critical turning point in U.S. relations with the Soviet Union, as his successor, Harry S. Truman, decided to take a tougher stance with the Russians. -
Truman confronts Molotov
Less than two weeks after taking over as president after the death of Franklin D. Roosevelt, Harry S. Truman gives a tongue-lashing to Soviet Foreign Minister Vyacheslav Molotov. The incident indicated that Truman was determined to take a "tougher" stance with the Soviets than his predecessor had. -
Soviets agree to hand over power in West Berlin
Fulfilling agreements reached at various wartime conferences, the Soviet Union promises to hand power over to British and U.S. forces in West Berlin. Although the division of Berlin (and of Germany as a whole) into zones of occupation was seen as a temporary postwar expedient, the dividing lines quickly became permanent. The divided city of Berlin became a symbol for Cold War tensions. -
United States conducts first test of the atomic bomb
The United States conducts the first test of the atomic bomb at at the Trinity bomb site in central New Mexico. The terrifying new weapon would quickly become a focal point in the Cold War between the United States and the Soviet Union. -
U.S. Senate approves United Nations charter
In a ringing declaration indicating that America's pre-World War II isolation was truly at an end, the U.S. Senate approves the charter establishing the United Nations. In the years to come, the United Nations would be the scene of some of the most memorable Cold War confrontations between the United States and the Soviet Union. -
The Potsdam Agreement
Formally establishes the four-Power status of Berlin. -
United States used the first atomic bomb in war
The atomic bombings of the cities of Hiroshima and Nagasaki in Japan were conducted by the United States during the final stages of World War II in 1945. The two events are the only use of nuclear weapons in war to date. -
Russia enters war against Japan
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Truman signs United Nations Charter
President Harry S. Truman signs the United Nations Charter and the United States becomes the first nation to complete the ratification process and join the new international organization. Although hopes were high at the time that the United Nations would serve as an arbiter of international disputes, the organization also served as the scene for some memorable Cold War clashes. -
Japan surrenders
Aboard the USS Missouri in Tokyo Bay, Japan formally surrenders to the Allies, bringing an end to World War II. -
Senate approves U.S. participation in United Nations
In an overwhelming vote of 65 to 7, the U.S. Senate approves full U.S. participation in the United Nations. The United Nations had officially came into existence on October 24, 1945, when its charter was ratified by China, France, the Soviet Union, the United Kingdom, the United States and a majority of other signatories. -
George Kennan sends "long telegram" to State Department
George Kennan, the American charge d'affaires in Moscow, sends an 8,000-word telegram to the Department of State detailing his views on the Soviet Union, and U.S. policy toward the communist state. Kennan's analysis provided one of the most influential underpinnings for America's Cold War policy of containment. -
Winston Churchill delivers "Iron Curtain" Speech
In one of the most famous orations of the Cold War period, former British Prime Minister Winston Churchill condemns the Soviet Union's policies in Europe and declares, "From Stettin in the Baltic to Trieste in the Adriatic, an iron curtain has descended across the continent." Churchill's speech is considered one of the opening volleys announcing the beginning of the Cold War. -
Soviets announce withdrawal from Iran
In conclusion to an extremely tense situation of the early Cold War, the Soviet Union announces that its troops in Iran will be withdrawn within six weeks. The Iranian crisis was one of the first tests of power between the United States and the Soviet Union in the postwar world. -
Voice of America begins broadcasts to Russia
With the words, "Hello! This is New York calling," the U.S. Voice of America (VOA) begins its first radio broadcasts to the Soviet Union. The VOA effort was an important part of America's propaganda campaign against the Soviet Union during the Cold War. -
Truman Doctrine is announced
In a dramatic speech to a joint session of Congress, President Harry S. Truman asks for U.S. assistance for Greece and Turkey to forestall communist domination of the two nations. Historians have often cited Truman's address, which came to be known as the Truman Doctrine, as the official declaration of the Cold War. -
Bernard Baruch coins the term "Cold War"
Multimillionaire and financier Bernard Baruch, in a speech given during the unveiling of his portrait in the South Carolina House of Representatives, coins the term "Cold War" to describe relations between the United States and the Soviet Union. The phrase stuck, and for over 40 years it was a mainstay in the language of American diplomacy. -
Soviet Union rejects Marshall Plan assistance
Soviet Foreign Minister V. M. Molotov walks out of a meeting with representatives of the British and French governments, signaling the Soviet Union's rejection of the Marshall Plan. Molotov's action indicated that Cold War frictions between the United States and Russia were intensifying. -
George Marshall calls for aid to Europe
In one of the most significant speeches of the Cold War, Secretary of State George C. Marshall calls on the United States to assist in the economic recovery of postwar Europe. His speech provided the impetus for the so-called Marshall Plan, under which the United States sent billions of dollars to Western Europe to rebuild the war-torn countries. -
Truman signs the National Security Act
President Harry S. Truman signs the National Security Act, which becomes one of the most important pieces of Cold War legislation. The act established much of the bureaucratic framework for foreign policymaking for the next 40-plus years of the Cold War. -
Communists take power in Czechoslovakia
President Eduard Benes allows a communist-dominated government to be organized. Although the Soviet Union did not physically intervene (as it would in 1968), Western observers decried the virtually bloodless communist coup as an example of Soviet expansion into Eastern Europe. -
Soviets stop U.S. and British military trains
On this day, Soviet troops stop U.S. and British military trains traveling through the Russian zone of occupation in Germany and demand that they be allowed to search the trains. British and U.S. officials refused the Soviet demand, and the problems associated with the Soviet, British, and U.S. occupation of Germany grew steadily more serious in the following months. -
Truman signs Foreign Assistance Act
President Harry S. Truman signs off on legislation establishing the Foreign Assistance Act of 1948, more popularly known as the Marshall Plan. The act eventually provided over $12 billion of assistance to aid in the economic recovery of Western Europe. -
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The Berlin blockade.
The USSR blocks all surface access routes between the western zones of ocupation and the western sectors of Berlin. The western Allies supply the population of West Berlin by air. -
Soviets blockade West Berlin
One of the most dramatic standoffs in the history of the Cold War begins as the Soviet Union blocks all road and rail traffic to and from West Berlin. The blockade turned out to be a terrible diplomatic move by the Soviets, while the United States emerged from the confrontation with renewed purpose and confidence. -
Truman issues peacetime draft
President Harry S. Truman institutes a military draft with a proclamation calling for nearly 10 million men to register for military service within the next two months. Truman's action came during increasing Cold War tensions with the Soviet Union. -
Truman announces Point Four program
In his inaugural address, President Harry S. Truman calls for a "bold new program for making the benefits of our scientific advances and industrial progress available for the improvement and growth of underdeveloped nations." The resulting Point Four program (so-called because it was the fourth point in Truman's speech) resulted in millions of dollars in scientific and technical assistance--as well as hundreds of U.S. experts--sent to Latin American, Asian, Middle Eastern, and African nations. -
United States rejects proposal for conference with Stalin
In response to Soviet leader Joseph Stalin's proposal that President Harry S. Truman travel to Russia for a conference, Secretary of State Dean Acheson brusquely rejects the idea as a "political maneuver." This rather curious exchange was further evidence of the diplomatic sparring between the United States and the Soviet Union that was so characteristic of the early years of the Cold War. -
East Germany approves new constitution
In a precursor to the establishment of a separate, Soviet-dominated East Germany, the People's Council of the Soviet Zone of Occupation approves a new constitution. This action, together with the U.S. policy of pursuing an independent pathway in regards to West Germany, contributed to the permanent division of Germany. -
NATO pact signed
The United States and 11 other nations establish the North Atlantic Treaty Organization (NATO), a mutual defense pact aimed at containing possible Soviet aggression against Western Europe. NATO stood as the main U.S.-led military alliance against the Soviet Union throughout the duration of the Cold War. -
Soviet clowns lampoon U.S. foreign policy
At the opening night of the spring edition of the famous Moscow Circus, clowns and magicians fire salvos of jokes aimed at the United States. Although a relatively minor aspect of the total Cold War, the night was evidence that even humor played a role in the battle between the United States and the Soviet Union. -
Federal Republic of Germany is established
The Federal Republic of Germany (popularly known as West Germany) is formally established as a separate and independent nation. This action marked the effective end to any discussion of reuniting East and West Germany. -
Truman signs National Security Bill
President Harry S. Truman signs the National Security Bill, which establishes the Department of Defense. As the Cold War heated up, the Department of Defense became the cornerstone of America's military effort to contain the expansion of communism. -
Mao Zedong outlines the new Chinese government
At the opening of the Chinese People's Political Consultative Conference in Peking, Mao Zedong announces that the new Chinese government will be "under the leadership of the Communist Party of China." -
Chinese Nationalists move capital to Taiwan
As they steadily lose ground to the communist forces of Mao Zedong, Chinese Nationalist leaders depart for the island of Taiwan, where they establish their new capital. Nationalist leader Chiang Kai-shek left for the island the following day. This action marked the beginning of the "two Chinas" scenario that left mainland China under communist control and vexed U.S. diplomacy for the next 30 years. -
Soviets boycott United Nations Security Council
Jacob Malik, the Soviet representative to the United Nations, storms out of a meeting of the Security Council, this time in reaction to the defeat of his proposal to expel the Nationalist Chinese representative. At the same time, he announced the Soviet Union's intention to boycott further Security Council meetings. -
Communist China recognizes North Vietnam
The People's Republic of China bestows diplomatic recognition upon the Democratic Republic of Vietnam. Communist China's official recognition of Ho Chi Minh's communist regime resulted in much needed financial and military assistance in Ho's battle against the French in Vietnam, and also pushed the United States to take a more intensive and active role in the conflict in Southeast Asia. -
McCarthy says communists are in State Department
During a speech in Wheeling, West Virginia, Senator Joseph McCarthy (Republican-Wisconsin) claims that he has a list with the names of over 200 members of the Department of State that are "known communists." The speech vaulted McCarthy to national prominence and sparked a nationwide hysteria about subversives in the American government. -
USSR and PRC sign mutual defense treaty
The Soviet Union and the People's Republic of China, the two largest communist nations in the world, announce the signing of a mutual defense and assistance treaty. -
Soviet Union denies Klaus Fuchs served as its spy
one week after British physicist Klaus Fuchs was sentenced to 14 years in prison for his role in passing information on the atomic bomb to the Russians, the Soviet Union issues a terse statement denying any knowledge of Fuchs or his activities. Despite the Russian disclaimer, Fuchs' arrest and conviction led to the uncovering of a network of individuals in the United States and Great Britain who had allegedly engaged in spying activities for the Soviet Union during World War II. -
Nationalist Chinese forces invade mainland China
In a surprise raid on the communist People's Republic of China (PRC), military forces of the Nationalist Chinese government on Taiwan invade the mainland and capture the town of Sungmen. Because the United States supported the attack, it resulted in even deeper tensions and animosities between the U.S. and the PRC. -
McCarthy charges that Owen Lattimore is a Soviet spy
During a radio broadcast dealing with a Senate investigation into communists in the U.S. Department of State, news is leaked that Senator Joseph McCarthy has charged Professor Owen Lattimore with being a top spy for the Soviet Union. Lattimore soon became a central figure in the Red Scare hysteria created by McCarthy's reckless charges and accusations. -
President Truman receives NSC-68
President Harry S. Truman receives National Security Council Paper Number 68 (NSC-68). The report was a group effort, created with input from the Defense Department, the State Department, the CIA, and other interested agencies; NSC-68 formed the basis for America's Cold War policy for the next two decades. -
Korean War begins
Armed forces from communist North Korea smash into South Korea, setting off the Korean War. The United States, acting under the auspices of the United Nations, quickly sprang to the defense of South Korea and fought a bloody and frustrating war for the next three years. -
Truman orders U.S. forces to Korea
three days after the United Nations Security Council voted to provide military assistance to South Korea, President Harry S. Truman orders U.S. armed forces to assist in defending that nation from invading North Korean armies. Truman's dramatic step marked the official entry of the United States into the Korean War. -
Truman declares state of emergency
In the wake of the massive Chinese intervention in the Korean War, President Harry S. Truman declares a state of emergency. Proclaiming that "Communist imperialism" threatened the world's people, Truman called upon the American people to help construct an "arsenal of freedom." -
U.N. condemns PRC for aggression
By a vote of 44 to 7, the United Nations General Assembly passes a resolution condemning the communist government of the People's Republic of China for acts of aggression in Korea. It was the first time since the United Nations formed in 1945 that it had condemned a nation as an aggressor. -
Joseph Stalin attacks the United Nations
In a statement focusing on the situation in Korea, Soviet Premier Joseph Stalin charges that the United Nations has become "a weapon of aggressive war." He also suggested that although a world war was not inevitable "at the present time," "warmongers" in the West might trigger such a conflict. -
Rosenbergs convicted of espionage
In one of the most sensational trials in American history, Julius and Ethel Rosenberg are convicted of espionage for their role in passing atomic secrets to the Soviets during and after World War II. The husband and wife were later sentenced to death and were executed in 1953. -
Truman warns of Cold War dangers
In his 1952 State of the Union address, President Harry S. Truman warns Americans that they are "moving through a perilous time," and calls for vigorous action to meet the communist threat. -
Supreme Court rules on communist teachers
In a 6-3 decision, the U.S. Supreme Court upholds a New York state law that prohibits communists from teaching in public schools. Coming at the height of the Red Scare in the United States, the Supreme Court decision was additional evidence that many Americans were concerned about possible subversive communist activity in their country. -
Red Scare dominates American politics
As the presidential election of 1952 begins to heat up, so do accusations and counteraccusations concerning communism in America. The "Red Scare"—the widespread belief that international communism was operating in the United States—came to dominate much of the debate between Democrats and Republicans in 1952. -
McCarren-Walter Act goes into effect
The McCarren-Walter Act takes effect and revises America's immigration laws. The law was hailed by supporters as a necessary step in preventing communist subversion in the United States, while opponents decried the legislation as being xenophobic and discriminatory. -
Truman announces U.S. has developed hydrogen bomb
In his final State of the Union address before Congress, President Harry S. Truman tells the world that that the United States has developed a hydrogen bomb. It was just three years earlier on January 31, 1950, that Truman publicly announced that had directed the Atomic Energy Commission to proceed with the development of the hydrogen bomb. Truman's directive came in responds to evidence of an atomic explosion occurring within USSR in 1949. -
Georgi Malenkov succeeds Stalin
Just one day after the death of long-time Soviet dictator Joseph Stalin, Georgi Malenkov is named premier and first secretary of the Communist Party of the Soviet Union. Malenkov's tenure was extremely brief, and within a matter of weeks he was pushed aside by Nikita Khrushchev. -
Khrushchev begins his rise to power
The Soviet government announces that Nikita Khrushchev has been selected as one of five men named to the new office of Secretariat of the Communist Party. Khrushchev's selection was a crucial first step in his rise to power in the Soviet Union—an advance that culminated in Khrushchev being named secretary of the Communist Party in September 1953, and premier in 1958. -
Eisenhower rejects calls for U.S. "isolationism"
In a forceful speech, President Dwight D. Eisenhower strikes back at critics of his Cold War foreign policy. He insisted that the United States was committed to the worldwide battle against communism and that he would maintain a strong U.S. defense. Just a few months into his presidency, and with the Korean War still raging, Eisenhower staked out his basic approach to foreign policy with this speech. -
Soviets crush antigovernment riots in East Berlin
he Soviet Union orders an entire armored division of its troops into East Berlin to crush a rebellion by East German workers and antigovernment protesters. The Soviet assault set a precedent for later interventions into Hungary in 1956 and Czechoslovakia in 1968. -
Dulles announces policy of "massive retaliation"
In a speech at a Council on Foreign Relations dinner in his honor, Secretary of State John Foster Dulles announces that the United States will protect its allies through the "deterrent of massive retaliatory power." The policy announcement was further evidence of the Eisenhower administration's decision to rely heavily on the nation's nuclear arsenal as the primary means of defense against communist aggression. -
Dulles asks for action against communism
Speaking before the 10th Inter-American Conference, Secretary of State John Foster Dulles warns that "international communism" is making inroads in the Western Hemisphere and asks the nations of Latin America to condemn this danger. Dulles's speech was part of a series of actions designed to put pressure on the leftist government of Guatemala, a nation in which U.S. policymakers feared communism had established a beachhead. -
Republican senators criticize Joseph McCarthy
Senate Republicans level criticism at fellow Republican Joseph McCarthy and take action to limit his power. The criticism and actions were indications that McCarthy's glory days as the most famous investigator of communist activity in the United States were coming to an end. -
Eisenhower gives famous "domino theory" speech
President Dwight D. Eisenhower coins one of the most famous Cold War phrases when he suggests the fall of French Indochina to the communists could create a "domino" effect in Southeast Asia. The so-called "domino theory" dominated U.S. thinking about Vietnam for the next decade. -
McCarthy Army hearings begin
Senator Joseph McCarthy begins hearings investigating the United States Army, which he charges with being "soft" on communism. These televised hearings gave the American public their first view of McCarthy in action, and his recklessness, indignant bluster, and bullying tactics quickly resulted in his fall from prominence. -
Geneva Conference begins
In an effort to resolve several problems in Asia, including the war between the French and Vietnamese nationalists in Indochina, representatives from the world's powers meet in Geneva. The conference marked a turning point in the United States' involvement in Vietnam. -
McCarthy charges communists are in the CIA
Senator Joseph McCarthy charges that communists have infiltrated the Central Intelligence Agency (CIA) and the atomic weapons industry. Although McCarthy's accusations created a momentary controversy, they were quickly dismissed as mere sensationalism from a man whose career was rapidly slipping away. -
Congress passes Communist Control Act
Congress passes the Communist Control Act in response to the growing anticommunist hysteria in the United States. Though full of ominous language, many found the purpose of the act unclear. -
First council meeting of SEATO
In the first council meeting of the Southeast Asia Treaty Organization, Secretary of State John Foster Dulles declares the United States is committed to defending the region from communist aggression. The meeting, and American participation in SEATO, set the stage for the U.S. to take a more active role in Vietnam. -
Allies end occupation of West Germany
The Federal Republic of Germany (West Germany) becomes a sovereign state when the United States, France, and Great Britain end their military occupation, which had begun in 1945. With this action, West Germany was given the right to rearm and become a full-fledged member of the western alliance against the Soviet Union. -
West Germany joins NATO
Ten years after the Nazis were defeated in World War II, West Germany formally joins the North Atlantic Treaty Organization (NATO), a mutual defense group aimed at containing Soviet expansion in Europe. This action marked the final step of West Germany's integration into the Western European defense system. -
The Warsaw Pact is formed
The Soviet Union and seven of its European satellites sign a treaty establishing the Warsaw Pact, a mutual defense organization that put the Soviets in command of the armed forces of the member states. -
Eisenhower presents his "Open Skies" plan
President Dwight D. Eisenhower presents his "Open Skies" plan at the 1955 Geneva summit meeting with representatives of France, Great Britain, and the Soviet Union. The plan, though never accepted, laid the foundation for President Ronald Reagan's later policy of "trust, but verify" in relation to arms agreements with the Soviet Union. -
Khrushchev declares that Eisenhower is "striving for peace"
In a long interview with visiting American attorney Marshall MacDuffie, Soviet leader Nikita Khrushchev adopts a friendly attitude toward the United States and indicates that he believes President Dwight Eisenhower is sincere in his desire for peace. The interview was the precursor to Khrushchev's announcement later that same year that he wanted "peaceful coexistence" between the United States and the Soviet Union. -
United States drops hydrogen bomb over Bikini Atoll
The United States conducts the first airborne test of an improved hydrogen bomb, dropping it from a plane over the tiny island of Namu in the Bikini Atoll in the Pacific Ocean. The successful test indicated that hydrogen bombs were viable airborne weapons and that the arms race had taken another giant leap forward. -
The United States presents the Baruch Plan
The United States presents the Baruch Plan for the international control of atomic weapons to the United Nations. The failure of the plan to gain acceptance resulted in a dangerous nuclear arms race between the United States and the Soviet Union during the Cold War. -
United States prepares new strategic plan for Middle East
days before an official announcement is to be issued by the Eisenhower administration, the New York Times leaks the news that the United States is preparing a major policy statement on the Middle East. In the wake of heightened tensions in the area caused by the French-British-Israeli invasion of Egypt in November, the announcement was greeted with caution both at home and abroad. -
Eisenhower proposes new Middle East policy
In response to the increasingly tense situation in the Middle East, President Dwight D. Eisenhower delivers a proposal to Congress that calls for a new and more proactive U.S. policy in the region. The "Eisenhower Doctrine," as the proposal soon came to be known, established the Middle East as a Cold War battlefield. -
Russia tests an intercontinental ballistic missile
The Soviet Union announces that it has successfully tested an intercontinental ballistic missile (ICBM) capable of being fired "into any part of the world." The announcement caused great concern in the United States, and started a national debate over the "missile gap" between America and Russia. -
Soviet Union launches Sputnik I
The successful launch of the unmanned satellite Sputnik I by the Soviet Union in October 1957 shocks and frightens many Americans. As the tiny satellite orbited the earth, Americans reacted with dismay that the Soviets could have gotten so far ahead of the supposedly technologically superior United States. -
Soviet Union announces troop reduction
The Soviet Union announces plans to cut the size of its standing army by 300,000 troops in the coming year. The reduction was part of a 1956 policy announced by Krushchev in anticipation of "peaceful coexistence" with the West, and an indication that Cold War relations between the United States and the Soviet Union were undergoing a slight thaw in the mid- to late-1950s. -
NASA established
The United States Congress passes legislation formally inaugurating the National Aeronautics and Space Administration (NASA). The establishment of NASA was a sign that the United States was committed to winning the "space race" against the Soviets. -
Cuban dictator Batista falls from power
In the face of a popular revolution spearheaded by Fidel Castro's 26th of July Movement, Cuban dictator Fulgencio Batista flees the island nation. As celebration and chaos intermingled in the Cuban capitol of Havana, U.S. policymakers debated how best to deal with the radical Castro and the ominous rumblings of anti-Americanism in Cuba. -
The God That Failed published
The God That Failed, a collection of essays by six writers and intellectuals who either joined or sympathized with the communist cause. The book provided interesting insight into why communism originally appealed to, and then disappointed, so many adherents in the United States and Europe, particularly during the 1920s and 1930s. -
Castro visits the United States
Four months after leading a successful revolution in Cuba, Fidel Castro visits the United States. The visit was marked by tensions between Castro and the American government. -
Nixon and Khrushchev have a "kitchen debate"
During the grand opening ceremony of the American National Exhibition in Moscow, Vice President Richard Nixon and Soviet leader Nikita Khrushchev engage in a heated debate about capitalism and communism in the middle of a model kitchen set up for the fair. The so-called "kitchen debate" became one of the most famous episodes of the Cold War. -
Soviet probe reaches the moon
A Soviet rocket crashes into the moon's surface, becoming the first man-made object sent from earth to reach the lunar surface. The event gave the Soviets a short-lived advantage in the "space race" and prompted even greater effort by the United States to develop its own space program.
