In 1904, the previous Division of the Pacific (1869-91) was re-established and formally stood up as the Pacific Division with subordinate or related commands, including the Department of California (to include the Hawaiian Islands) and the Department of the Columbia. The Pacific Division was headquartered at Fort Mason, San Francisco. By the end of 1907, the War Department, under Secretary of War William Howard Taft, had eliminated the echelon of administrative units called Divisions and subsequently the Pacific Division that same year. Notably, the first and only commander of the Pacific Division was Major General Arthur MacArthur Jr from 1903-1907.