Organized at large August to October, 1861. Company "K" organized February 12, 1862. Attached to Depts. of the Pacific and New Mexico.

SERVICE:
In camp at Oakland till October, 1861, and near Los Angeles, Cali., till December, 1861. Pursuit and capture of Showalter's party at Warner's Ranch, San Jose Valley, November 20-29, 1861 (Cos."F" and "G"). Moved to Fort Yuma December, 1861 and duty there till April, 1862 (Cos. "B," "D," "F", "H" and "I"). Company "D" at San Diego. Companies "A" and "C" at Camp Latham. Carleton's Expedition from Southern California through Arizona to Northwest Texas and New Mexico April 10-September 20, 1862. March from Fort Yuma to Pinos Villages, thence to Tucson, April 10-May 20. Expedition up the Gila River and engagement at Pechecho Pass April 15 (Co. "I"). March from Tucson, Ariz., across Desert to the Rio Grande River July 20-August 15. At La Mesilla till December 25. Moved to Fort Craig December 25-30. Duty by detachments at posts in New Mexico and Arizona, Las Cruces, Los Pinos, Franklin, Texas; Forts West, Craig, Selden, Union, Cummings, McRae, Whipple and Sumner, and operating against Indians in the Districts of New Mexico, Arizona and Utah, till October, 1866. Skirmish at Pinos Altas Mines January 29, 1863 (1 Co.). Company "G" at Camp Wright, Cali., January 1 to March 9, 1862. Moved to Fort Yuma and duty there till July 19. Moved to Tucson, Ariz., and duty there till December 2. At Messilla till April 20, 1863. At Franklin, Texas, till June 26. March to Fort McRae June 26-July 3. Rio de los Animos July 19. Expedition to Alamcito Mountains against Indians August 9-20, 1863. Expedition to Jornado del Muerta August 9-20, 1863. Expedition to Jornado del Muerta August 26-29. Operations against Navajo Indians August 20-December 16, 1863. Scout from Fort Wingate to Ojo Redendo September 15-October 5 (2 Cos.). Expedition against Indians in New Mexico November 5-15 and December 5-7, 1863. Scout in Southeastern Arizona July 6-24, 1864 (Co. "D"). Expedition from Fort Union August 4-September 15 (Detachment). Affair, San Andreas Mountains, August 12 (Detachment). Scout in Cimarron River, Northeast N. Mex., September 18-October 5. Engagement with Indians at Adobe Fort, on Canadian River, N. Mex., November 25 (Cos. "A" and Scout from Fort Cummings April 28-May 13, 1865 (Co. "G"). Duty in Districts of New Mexico, Arizona and Utah till October, 1866. Mustered out October 21, 1866.