The attack on Pearl Harbor by Japanese Imperial Navy aircraft and submarines took place in the early morning of December 7, 1941, during the Battle of Pearl Harbor. Japanese attack on Pearl Harbor: On November 26, 1941, a fleet of six aircraft carriers left Japan for Pearl Harbor under the command of Japanese Navy Lieutenant General Nam Yun-zhong-yi. The ship sailed to the North Pacific to wait. The Pearl Harbor incident occurred on the morning of December 7, 1941, when aircraft and submarines from the Imperial Navy of Japan suddenly attacked Pearl Harbor, the US naval base, and the airport of the US Army and Navy on Oahu Island, Hawaii. The attack on Pearl Harbor marked the outbreak of the Pacific War, and the Japanese army temporarily gained military advantage in the Pacific region and took the opportunity to invade Southeast Asian countries in a large scale.