The bombing of Nagasaki was an important event in World War II because it was the second atomic bomb attack on Japan and the last major act of the war. The bombing of Nagasaki on August 9, 1945, was the second atomic bomb attack on Japan and the last major act of the war. The bombing of Nagasaki, along with the bombing of Hiroshima three days earlier, was a major factor in Japan's decision to surrender, thus ending World War II.
