History of Hawaii
Pearl Harbor was surprisingly attacked on December 7, 1941 by the Imperial Japanese Navy, killing 2,403 people and sinking the main American battleship fleet. Fortuitously, the four Pacific aircraft carriers were not in port and escaped damage. Hawaii was put under martial law until 1945. Unlike the West Coast of the United States in which 100,000 ethnic Japanese citizens were interned, the Japanese American population in Hawaii completely avoided such similar fate, though hundreds of pro-Japan leaders were arrested. Pearl Harbor was the U.S.' main forward base for the Pacific War. The Japanese tried to invade in summer 1942 but were defeated at the Battle of Midway. Hundreds of thousands of American soldiers, sailors, Marines, and airmen passed through on their way to the fighting.
George Marshall
After World War II ended, the Congressional Joint Committee on the Investigation of the Pearl Harbor Attack received testimony on the intelligence failure. It amassed 25,000 pages of documents, 40 volumes, and included nine reports and investigations, eight of which had been previously completed. These reports included criticism of Marshall for delay in sending General Walter Short, the Army commander in Hawaii, important information obtained from intercepted Japanese diplomatic messages. The report also criticized Marshall's lack of knowledge of the readiness of the Hawaiian Command during November and December 1941. Ten days after the attack, Lt. General Short and Admiral Husband E. Kimmel, commander of the Navy at Pearl Harbor, were both relieved of their duties. The final report of the Joint Committee did not single out or fault Marshall. While the report was critical of the overall situation, the committee noted that subordinates had failed to pass on important information to their superiors, including Marshall.