This section provides an overview of the history of the Manhattan Project, the key organizations involved, the science behind the bomb, and more.
Before the Trinity test, Manhattan Project officials realized that a calibration explosion using ordinary high-explosives would be useful.
The 509th Composite Group was organized as the weapon delivery arm of the Manhattan Project.
The Manhattan Project ushered in the Atomic Age.
Although the Manhattan Project was overall a surprisingly safe project, there were a few tragic accidents.
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.
President Franklin D. Roosevelt authorized the research, development, and production of an atomic bomb despite great uncertainties.
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.