 After hosting the 1939 Golden Gate International Exposition, the United States Navy deemed Treasure Island an ideal location for transporting people and machines to the Pacific theater, and on April 17, 1942, established Treasure Island Naval Station (for surface ships and submarines) and as an Auxiliary Air Facility airfield (for airships, blimps, dirigibles, planes and seaplanes) which also included a portion of Yerba Buena Island.Quarters One became the residence of the Commander in Chief, US Pacific Fleet (CINCPACFLT).Several other buildings used by the Naval Station during World War II also remain on the island, including the Senior Officers' Quarters in Quarters A, B, C, 2, 3, 4, 5, 6, 7, 8 and 9.