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Admiral Chester W. Nimitz, Commander in Chief of the Pacific Fleet, who assumed naval command in the Territory of Hawaii December 18,1941, testified that the Hawaiian area constituted the only base for the Navy in the Pacific Ocean at that time and that throughout the war until the last Japanese carrier was destroyed, a Japanese surprise carrier attack on the Islands was within the enemy’s capabilities. While invasion by sea-borne troops in sufficient number to seize a beach head was not probable, invasion by submarine commando raiders and espionage parties was imminent and constantly impending. Lieutenant General Robert C. Richardson, Jr., Commanding General of the Central Pacific Area, who assumed command of the Hawaiian Department on June 1, 1943, testified that the Islands were within the theatre of operations of the Pacific Ocean area and that the Islands were the keystone of the defense of the western coast of our country. He testified that the Japanese fleet in April, 1944, was still capable of making a surprise attack upon Oahu by the use of air or undersea craft and that Pearl Harbor was the most attractive target for the enemy because it was the base of the Pacific fleet. He said that it was likely that Japan would take the risk of launching an attack because of the attractiveness of the target and the'considerable damage that might be inflicted. He pointed out that the probability of night attacks through the use of submarines and parties sent ashore to attack important installations was increased by the presence of disloyal individuals among the population of the Islands. The successes of our fleet had not removed the imminent danger of invasion because these successes made it more imperative for the enemy to repeat its former invasion of the Islands. He further testified that the discharge of his responsibility for military security required a method of enforcement of military security regulations which was prompt and subject to his *340immediate control and authority and that under martial law the provost courts provided such a method of enforcement. He testified that a military trial for such an offense as that of Duncan in attacking the Pearl Harbor Navy Yard sentries was necessary in order to uphold the authority of military sentries charged with important military duties. He also gave as his opinion that military necessity required trial of White’s offense in a military tribunal in August of 1942 at which time the Japanese successful military offensive still continued. In addition to the occupation of Hong Kong, the Malay Peninsula, Singapore, the Dutch East Indies, and bases in New Guinea, the Japanese had successfully occupied our own territories of Guam and Wake which, with Midway, constituted the island chain connecting Hawaii with the Philippines which themselves were soon occupied. The enemy’s occupation of the Solomon Islands, including Tulagi and Guadalcanal, gave the enemy advance air and naval bases for offensive operations against our South Pacific supply line and the north coast of Australia. Biennial Report of the Chief of Staff of the United States Army to the Secretary of War (1943) 14 (House Doc. 288,78th Cong., 1st Sess.); Mclnnis, The War, Third Year (1942) 238. Early in May, 1942, one Japanese attempt to extend enemy control southeastward along the borders of the Coral Sea with the ultimate objective of an attack on Australia, was repulsed in the Battle of the Coral Sea. The Japanese offensive, however, continued. In early June the Japanese attempt to occupy Midway Island preliminary to an invasion of Hawaii was thwarted in the Battle of Midway. At the same time, however, Japanese forces occupied our territory of Attu, *341Agattu and Kiska in the Aleutian Islands. Biennial Report, supra, p. 30. (These islands were not recovered until May, 1943. Biennial Report, supra, p. 31.) Japanese advances in New Guinea continued during the summer of 1942 and by September, 1942, had forced Allied ground forces back to within 30 miles of Port Moresby, a gateway to Australia. Biennial Report, supra, p. 14. On August 7 a landing was ■made on Guadalcanal by United States forces. For a time it did not appear that the effort to wrest this crucial island from the Japanese could succeed. A strong Japanese attempt to' recapture Guadalcanal was beaten off as late as November 16, 1942. Not until early in 1943 was enemy resistance on Guadalcanal overcome. Ibid. Even then our forces had only succeeded in checking the enemy’s offensive and had not launched their own offensives or ousted the enemy from any American territory. The American offensive in the Central Pacific did not begin until a year later with the invasion of the Gilbert Islands in November, 1943, followed by invasion of the Marshall Islands in January, 1944, and the invasion of the Mariana Islands in July, 1944. Biennial Report of the Chief of Staff of the United States Army to the Secretary of War (1945) 69. Our forces landed on Guam on July 21 and resistance ceased on August 10. By that time our forces in the Southwest Pacific under General MacArthur had reduced or by-passed the enemy’s footholds in New Guinea and the way was prepared for the Battle of the Philippines which began with the landing on Leyte on October 20,1944. Id., p. 75 ei seq. The “Battle of the Bulge,” in the Ardennes, was fought and won at high cost in December and January, 1944-45. Id., p. 44.