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Franklin D. Roosevelt
US Franklin D. Roosevelt suffers a stroke and dies while on vacation in Warm Springs, GA. -
Hiroshima
US President Truman gives permission for the world's first military use of an atomic weapon against the Japanese city of Hiroshima in an attempt to bring the only remaining theatre of war from the Second World War in the Pacific to a swift closure. -
Declare war on Japan
The USSR honors its agreement to declare war on Japan within three months of the victory in Europe, and invades Manchuria. In accordance with the Yalta Conference agreements, the Soviet Union also invades Japanese Sakhalin and the Kuril Islands. -
Truman is presented with the Clifford-Elsey Report
Truman is presented with the Clifford-Elsey Report, a document which listed Soviet violations of agreements with the United States. which will help him decide what to do with the violations -
Control in Germany
The American and British zones of control in Germany are united to form the Bizone also known as Bizonia. -
Marshall Plan
Truman signs the Marshall Plan into effect. By the end of the programs, the United States has given $12.4 billion in economic assistance to European countries. -
The North Atlantic Treaty Organization (NATO
The North Atlantic Treaty Organization (NATO) is founded by Belgium, Canada, Denmark, France, Iceland, Italy, Luxembourg, the Netherlands, Norway, Portugal, the United Kingdom, and the United States, in order to resist Communist expansion. -
The Soviet Union
The Soviet Union tests its first atomic bomb. The test, known to Americans as Joe 1, succeeds, as the Soviet Union becomes the world's second nuclear power. -
North Korea invades South Korea.
North Korea invades South Korea. The Soviet Union cannot veto, as it is boycotting the Security Council over the admission of People's Republic of China.Eventually, the number of countries operating under the UN aegis increases to 16: Australia, Belgium, Canada, Colombia, Ethiopia, France, Greece, Luxembourg, the Netherlands, New Zealand, the Philippines, South Africa, Thailand, Turkey, the United Kingdom, and the United States -
Mutual Security Act
President Harry S. Truman signs the Mutual Security Act, announcing to the world, and its communist powers in particular, that the U.S. was prepared to provide military aid to "free peoples. -
The United Kingdom
The United Kingdom successfully tests its atomic bomb in Operation Hurricane. The test makes the UK the world's third nuclear power. -
Ivy Mike
The United States tests their first thermonuclear bomb, Ivy Mike a thermonuclear bomb is an energy from a primary nuclear fission reaction to compress and ignite a secondary nuclear fusion reaction -
USS Nautilus
The United States launches the world's first nuclear submarine, USS Nautilus. The nuclear submarine would become the ultimate nuclear deterrent. -
John F. Kennedy is shot
John F. Kennedy is shot and killed in Dallas. There has been some speculation over whether communist countries or even CIA were involved in the assassination, but those theories remain controversial. Kennedy's vice-president Lyndon B. Johnson becomes President of the United States.
