As war loomed on the horizon, Halsey had Browning prepare the crew of "Enterprise" and her aircraft squadrons. They were en route to Hawaii after delivering a doomed Marine Corps fighter squadron to Wake Island when the Japanese attacked Pearl Harbor. USS "Enterprise" scout bombers arrived over Pearl during the attack, and immediately went into action in defense of the naval base. Six of them were shot down. The carrier reached the devastated harbor just after the attack, and put to sea again early the next morning to patrol against any additional threats to the Hawaiian Islands. ("Enterprise" planes sank a Japanese submarine on December 10, 1941, three days into the war.)