Organized at large October to December, 1864. Attached to Dept. of the Pacific. Companies "A," "C" and "K" ordered from San Francisco to Camp Drum, Southern California, March, 1865. Companies "A" and to Fort Yuma. Company "C" to Fort Mojave. Regiment moved to District of Arizona June, 1865, and duty there, stationed at various posts, till June, 1866. Mustered out June 28, 1866.