How did Manhattan project lead to Japan's defeat?

The Manhattan Project developed the atomic bombs that were dropped on Hiroshima and Nagasaki in August 1945, leading to Japan's swift defeat in World War II. These bombings caused unprecedented destruction and loss of life, compelling Japan to surrender unconditionally. The overwhelming power of atomic weaponry demonstrated to the Japanese leadership that further resistance was futile, ultimately hastening the end of the war. The project's success not only changed the course of the conflict but also marked the beginning of the nuclear age.