This section provides an overview of the history of the Manhattan Project, the key organizations involved, the science behind the bomb, and more.
Some of the terms encountered when perusing the website can be confusing or obscure. This glossary is provided to assist readers and learners of Manhattan Project history.
The Japanese attack on Pearl Harbor brought the US into World War II.
On April 9, 1942, the American troops on the Bataan Peninsula of the Philippines surrendered to the Japanese. The captured men were then subjected to the torturous Bataan Death March.
President Franklin D. Roosevelt authorized the research, development, and production of an atomic bomb despite great uncertainties.
The first atomic bomb, Little Boy, was dropped on Japan on August 6, 1945.
During the first half of 1942, several routes to a bomb were explored.
The Frisch-Peierls Memorandum was an important assessment confirming the feasibility of an atomic bomb.
The story of U.S.-U.K. nuclear partnership is one of both collaboration and division.
The U.S. military uses the term “Broken Arrow” to refer to an accident that involves nuclear weapons or nuclear weapons components.