Manhattan Project
August 13, 1942 โ January 1, 1947
Secret United States research programme, with British and Canadian help, that developed the first nuclear weapons during World War II.
Battles and events 1
July 16, 1945
Manhattan ProjectAugust 13, 1942 โ January 1, 1947
Secret United States research programme, with British and Canadian help, that developed the first nuclear weapons during World War II.
