Both of those military departments merged into the Pacific Division ceased to exist.
Division headquarters directly administered affairs in California and Oregon Territory.
On 15 June 1852, Pacific Division headquarters was moved from Benicia to the San Francisco.
[29] The previous Division of the Pacific (1869-91) was re-established and formally stood up in 1904 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.
[31] By the end of 1907, the War Department, under Secretary of War William Howard Taft from 1 February 1904 – 30 June 1908, had eliminated the echelon of administrative units called Divisions and subsequently the Pacific Division that same year.