Final answer:
The Manhattan Project was a top-secret research project during World War II to create nuclear weapons for the United States.
Step-by-step explanation:
The purpose of the Manhattan Project was to create nuclear weapons for the United States. It was a top-secret research project during World War II, led by the United States, to develop the atomic bomb. The project was initiated due to fears that Nazi Germany was also working on developing nuclear weapons.
Learn more about Manhattan Project