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Pearl Harbor
The Japanese attack the U.S navy base at Pearl Harbor, Hawaii, destroying 188 aircraft and causing over 4,000 U.S casualties -
Declaration of war on the Empire of Japan
The United States declares war on Japan -
Period: to
Manhattan Project
Started in 1939, active from 1942-1945, and disbanded in 1947, the Manhattan Project produced and tested the world's first atomic bombs. -
Yalta Conference
Stalin, Churchill, and Truman attend this conference to discuss the rebuilding and reorganization of Europe. -
Franklin D. Roosevelt's Death
Franklin D. Rooselevelt passes away and Vice President, Harry S. Truman becomes the 33rd President of the United States. -
Trinity
The United States tests the first atomic bomb in New Mexico (operation codename: Trinity) -
Potsdam Declaration
The Potsdam Declaration called for the unconditional surrender of the Japanese and stated that if they did not surrender, it was subject to "utter destruction". -
Atomic bombing of Hiroshima
Atomic bomb, codename; Little Boy, was dropped on Hiroshima, causing roughly 66,000 deaths and 69,000 injuries. -
Atomic Bombing of Nagasaki
The atomic bomb, codename; Fat Man, was dropped on Nagasaki causing roughly 44,000 deaths. -
Start of the Cold War
It is agreed by many scientists that the cold war started rouhgly in 1947 and ended in 1989
