Department of the Pacific had six subordinate military districts during the Civil War: On July 27, 1865 the Military Division of the Pacific was created under Major General Henry W. Halleck, replacing the Department of the Pacific, consisting of the Department of the Columbia that now consisted of the state of Oregon and the territories of Washington and Idaho and the expanded Department of California that now consisted of the states of California and Nevada and the Territory of New Mexico and Territory of Arizona. On 30 May 1898, Gen. Wesley Merritt established in San Francisco the Headquarters, US Expeditionary Forces and Department of
Pacific jack mackerel "Trachurus", especially "Trachurus murphyi", which was once thought to be a subspecies of "T. symmetricus", and inhabits waters further south. Pacific jack mackerel travel in large schools, ranging up to 600 miles offshore and to depths of 400 m, generally moving through the upper part of the water column. The Pacific jack mackerel is distributed through the eastern Pacific Ocean from Alaska in the north, south to the western North American seaboard to the Baja California peninsula in the Gulf of California. It has been reported as far south as the Galápagos Islands, but at these latitudes it would be