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First Atomic Bomb
Winston and Roosevelt were in agreement with the development with the first atomic bomb. -
Manhattan Project
The Manhattan Project was a research and development undertaking during World War II that produced the first nuclear weapons. It was led by the United States with the support of the United Kingdom and Canada. -
Jefferson Memorial
The Jefferson Memorial is a presidential memorial built in Washington, D.C. between 1939 and 1943 under the sponsorship of President Franklin D. Roosevelt. -
Little Big Inch
The Little Big Inch pipeline for refined petroleum products is completed from Texas to New Jersey. Like the Big Inch, it is built by a private company, War Emergency Pipelines, but owned by the Federal government. -
D Day
The Normandy landings were the landing operations on Tuesday, 6 June 1944 of the Allied invasion of Normandy in Operation Overlord during World War II. Codenamed Operation Neptune and often referred to as D-Day, it was the largest seaborne invasion in history. -
Port Chicago Incident
The Port Chicago disaster was a deadly munitions explosion that occurred on July 17, 1944, at the Port Chicago Naval Magazine in Port Chicago, California, United States. -
Battle of Okinawa
American troops invade Okinawa, beginning the Battle of Okinawa, which would continue until June 21 -
Atomic Energy Act
President Truman signs the Atomic Energy Act of 1946 transferring Manhattan Project assets and responsibilities to the civilian Atomic Energy Commission. -
Korean War
North Korea invades South Korea. The Korean War begins -
22nd Amendment
The Twenty-second Amendment to the United States Constitution, limiting Presidents to two terms, is ratified. -
Nuclear testing
Nuclear testing at the Nevada Test Site, United States conducts its first and only nuclear artillery test.