Why did the US began in the Manhattan Project?

The Manhattan Project was initiated by the United States during World War II primarily due to fears that Nazi Germany was developing nuclear weapons. In response to this threat, the U.S. government aimed to accelerate research into atomic energy and weaponry, leading to the project's establishment in 1942. It involved collaboration between scientists and military leaders and ultimately resulted in the development of the first atomic bombs, which were used in 1945 against Japan. The project marked a significant turning point in both military strategy and scientific research.