From unpromising beginnings in March 1942, the Allied submarine base at Fremantle on the west coast of Australia became a vital part of the Allied offensive against Japan. Pushed back from the Philippines and the Netherlands' East Indies, American submariners, accompanied by a small group of Dutch forces, retreated to Fremantle as a last resort. The location was chosen for its good harbor and the fact that it was outside the range of land-based Japanese aircraft. Unfortunately the base was also far from their patrol areas and supply lines, and it was difficult to reinforce should the enemy attack. Thanks largely to a welcoming civilian population, morale quickly improved. The hospitality and sense of belonging fostered by Western Australians became legendary among Allied submariners and remains central to their wartime memories. Perhaps as a result of such a positive experience, the Allied forces became much more successful in combat. Intertwining social and military history, <i>Fremantle's Submarines</i> relates how courage, cooperation, and community made Fremantle arguably the most successful military outpost of World War II from the standpoint of troop morale.