1st REGIMENT CAVALRY.

Organized as a Battalion of 5 Companies at Camp Merchant, near Oakland, Cali., and mustered in as follows: Co. "A," August 16; Co. "B," October 31; Co. "C," October 31; Co. "D," September 9, and Co. "E," August 15, 1861. 7 new Companies organized and mustered in as follows: Co. "F," December 15; Co. "G," June 13; Co. "H," December 31; Co. "I," November 12; Co. "K," May 16; Co. "L," August 15, and Co. "M," May 16, 1863.

SERVICE.-- Companies "A," "B," "C," "D," "E" moved to Southern California and duty at Los Angeles (3 Cos.) and at San Bernardino (2 Cos.) till March, 1862. Pursuit and capture of Showalter's party at Warner's Ranch, near San Jose Valley, November 20-29, 1861 (Detachment). Attached to Carlton's California Column, organized for an Expedition to recapture the Forts and Posts in Arizona and New Mexico, March, 1862. March to Stanwix Rancho, Arizona, March 1-16. Carlton's Expedition through Arizona to Northwest Texas and Indian Territory April 8-September 20. Led advance guard of the Column on its march across the Yuma and Colorado Deserts to the Rio Grande River. March to Picacho Pass April 8-15. Action at Picacho Pass April 15. March to Pimos Villages April 16-24. Expedition to Kenyon Station April 26-29. Duty at Pimos Villages till May 15. March to Tucson May 15-20. Occupation of Tucson May 20. Reoccupation of Fort Breckenridge, afterwards Fort Stanford, at Junction of the Gila and San Pedro Rivers, May 24, and duty there till June 17. Moved to Tucson, thence to Fort Thorne, Arizona, on the Rio Grande River, June 21-July 6. Reoccupation of Fort Thorne July 6. Expedition for the reoccupation of Mesilla, Fort Fillmore and Fort Bliss July 15-19. At Las Cruces till August 16. Expedition to Fort Bliss and Fort Quitman August 16-22. At Camp Johnson, Texas, till October. Affair at San Pedro Crossing, Arizona, September 21 (Detachment). At Mesilla, Arizona, till January, 1863. Expedition against Apache Indians November 15-December 31, 1862. White Mountains November 15. At Fort West, Dept. of New Mexico, till September, 1863. Skirmish at Bonito Rio, N. Mex., March 27 (Cos. "A," "B" and "L"). Skirmish near Fort Bowie, Arizona, April 25 (Detachment). Operations against Navajo Indians in New Mexico August 20-December 16, 1863. Skirmish at San Pedro Crossing, Arizona, August 22. Fort Bowie, Arizona, August 27 (Co. "E"). Duty at Las Cruces, N. Mex., till December, 1863. Companies scattered at various points and Posts in Districts of Arizona and California and Depts. of New Mexico and the Pacific till September, 1866. Skirmish at Oregon Mountains, Ore., January 28, 1864 (Co. "D"). Skirmish at Foot of Sierra Bonito, N. Mex. (Co. "C"). Doubtful Canon, N. Mex., May 4 (Co. "I"). Spencer's Ranch, near Presidio del Norte, N. Mex., May 15 (Co. "A"). Expedition from Fort Craig, N. Mex., to Fort Goodwin, Arizona, May 16-August 2. Expedition to Gila River May 25-July 13 (Cos. "C," "F" and "L"). Scout in Southeast Arizona July 6-24 (Co. "C"). Croton Springs, Arizona, July 14 (Co. "L"). Expedition to Pinal Mountains, Arizona, July 18-August 17 (Co. "E"). Company "I" at Fort Goodwin, Arizona, July, 1864, to November, 1865, and at Fort McDowell till April, 1866. Expedition to Southwest New Mexico July 23-October 10, 1864 (Co. "C"). Expedition from Fort Craig to Fort Goodwin, Arizona, October 1-November 27, 1864. St. Vrain's Old Fort, Canadian River, November 25, 1864 (Cos. "B," "K" and "M"). Fort Buchanan, Arizona, February 17, 1865. Scout from Fort Sumner May 10-19, 1865. Scout from Camp Nichols June 13-17, 1865 (Co. "F"). Skirmish, Santa Fe Road, N. Mex., June 14 (Co. "F"). Scout from Fort Sumner to Oscura Mountains June 15-22 (Detachment). Scout from Fort Bowie to Gila River, Arizona, June 26-July 6 (Cos. "F," "L" and "M"). Sacramento Mountains, N. Mex., July 1 (Cos. "G" and "H"). Cottonwood Creek July 3 (Cos. "F," "L" and "M"). Cavalry Canon July 4 (Cos. "F," "L" and "M"). Expedition from Fort Bowie to Maricopa Wells July 10-21 (Detachment). La Monica Springs, N. Mex., September 4, 1865 (Cos. "G" and "H"). Company "L" stationed at Camp Union, Cali., October, 1863, to January, 1864; Drum Barracks, Cali., February and March, 1864; Riventon, Arizona, April and May, 1864; Tubac, Arizona, to June, 1865; Fort Bowie, Arizona, to February, 1866; Fort McDowell, February, 1866. Regiment mustered out March 6 to October 19, 1866.

1st BATTALION CAVALRY.

Organized at large in California March, 1863, to July, 1864. Attached to Dept. of the Pacific. Company "A" at Presidio, San Francisco, to December, 1863. Ordered to District of Humboldt December 26. Arrive there January 12, 1864. Duty at Fort Gaston till March 6. Ordered to Camp Curtis March 6, and duty escorting trains to Arcate and Fort Humboldt to September 1, 1864. Ordered to Fort Humboldt September 1 and duty there till November 12, 1864. Ordered to Camp Wright and duty there till February, 1865. Ordered to Drum Barracks, District of Southern California, February 25, 1865, and duty there till May, 1865.

Company "B" on duty at the Presidio, San Francisco, till January, 1865. Ordered to San Juan, Monterey County, January 3, 1865, thence to Drum Barracks, District of Southern California, and duty there till May. Company "C" organized at Santa Barbara and ordered to Drum Barracks, District of Southern California, August 10, 1864, and duty there till May, 1865. Company "D" at Drum Barracks, District of Southern California, till May, 1865. Battalion assigned to duty in District of Arizona May, 1865, and operating against Indians in that District till April, 1866. Mustered out April 2, 1866.

2nd REGIMENT CAVALRY.

Organized at San Francisco September 5 to October 18, 1861. Company "A"--Ordered to Fort Churchill October 22, 1861, and duty there till July, 1862. March via Ruby Valley to Utah to protect Overland mail routes July to November, 1862. Duty in District of Utah at Camp Douglass and other points till November, 1864. Expedition from Camp Douglass to Cache Valley November 20-27, 1862. Skirmish at Cache Valley November 23, 1862. Engagement on Bear River, Utah, January 29, 1863. Expedition from Camp Douglass to Cedar Mountains, Utah, March 20-April 3. Skirmish, Cedar Fort, April 1. Expedition from Camp Douglass to Spanish Forks, Utah, April 11-20, 1863. Skirmish at Spanish Fork Canon April 15. Ordered to Camp Union, Sacramento, November, 1864. Duty there and in Districts of California and Nevada till muster out.

Company "B"--Moved to Southern California December, 1861. Duty at Los Angeles till March, 1862. Attached to Carlton's California Column on Expedition from Southern California through Arizona to Southwest Texas and New Mexico April 9-September 20, 1862. Occupation of Fort Quitman August 22. Duty at various points in Dept. of New Mexico till July, 1864. Operations against Navajo Indians in New Mexico August 20-December 16, 1863. Action at Pecos River, near Fort Sumner, January 5, 1864. Patrol Mojave Road between Camp Cady and Rock Springs, Southern California, July to September, 1864. Ordered to San Francisco September 26, thence to Camp Union, Sacramento, Call, November 12, Duty in District of California and Nevada till mustered out. Expedition from Dun Glen to Fairbanks Station, Nev., June 13-26, 1865.

Company "C"--Ordered to Fort Creek October 22, 1861, and duty there till muster out. Expedition to Honey Lake Valley November 3-29, 1862.

Company "D"--Ordered to Los Angeles, Cali., December 28, 1861, and duty there till March, 1862. Ordered to Camp Latham March 10, 1862. Expedition to Owens River, Cali., March 19-April 28. Skirmish near Bishop's Creek, Owens River Valley, April 9. Expedition from Camp Latham to Owens River June 11-October 8, 1862. Skirmish, Owens Lake, June 24. Moved to Visalia September 29-October 7. At Camp Babbett, near Visalia, and Camp Independence, Cali., to July, 1863. Expedition to Keyesville April 12-24, 1863, Operations in Owens River Valley April 24-May 26. Moved to Fort Tejon, Cali., July 6-August 17. Ordered to Camp Union, Sacramento, Cali., January 6, 1864. At Drum Barracks June to December, 1864. At Camp Union, Sacramento, December, 1864, to June, 1865. Ordered to Calusa, Cali. Duty there and in District of California and Arizona till muster out.

Company "E"--Ordered to Fort Humboldt December, 1861. Operations in Humboldt District March 22-August 31, 1862. Skirmishes at Daley's Ferry and on Mad River June 6-7. Cutterback's House, on Van Dusen Creek, July 2. Ordered to San Francisco September, 1862, thence to Visalia December 29, 1862, and to Camp Independence, Owens River, March 11, 1863. Operations in Owens River Valley April 24-May 26. Moved to Fort Tejon, Cali., July 6-August 17, 1863, thence to Camp Babbitt, near Visalia, August 18-September 12. Expedition from Camp Babbitt to Keyesville April 23-24, 1864. Duty in District of California till muster out.

Company "F"--Ordered from San Francisco to Camp Union, Sacramento, December 6, 1862. Duty there and at Camp Bidwell till June, 1865. Skirmish on Eel River, near Fort Baker, April 26, 1862, and at Arcata, near Light Prairie, May 21, 1862. Ordered to Fort Crook June, 1865, and duty there and in the District of California and Nevada till muster out.

Company "G"--Ordered to Los Angeles December 28, 1861. Expedition from Camp Latham to Owens River. Cali., March 19-April 28, 1862. Skirmish at Bishop's Creek, Owens River Valley, April 9. Expedition from Camp Latham to Owens River June II-October 8, 1862. Skirmish at Owens Lake June 24. At Camp Independence till July, 1863. Moved to Fort Tejon, Cali., July 6-August 17, and to Camp Babbitt December, 1863. Duty there till August, 1864. Ordered to Camp Union, Sacramento, August 18, 1864. Duty there and in the District of California till muster out.

Company "H"--Ordered to Fort Churchill October 22, 1861. Duty there till July, 1862. March via Ruby Valley to Utah to protect Overland mail route July to November, 1862. Expedition from Fort Ruby, Nev., to Camp Douglass, Utah, September 30-October 29. Affairs on Humboldt River October 11 and 15, 1862. Expedition from Camp Douglass to Cache Valley November 20-27, 1862. Skirmish at Cache Valley November 23. Engagement on Bear River, Utah, January 29, 1863. Expedition from Camp Douglass to Spanish Fork April 11-20. Spanish Fork Canon April 15. Duty in District of Utah till December, 1864. Expedition from Camp Douglass to Soda Springs, on Bear River, Idaho, May 5-30, 1863. At Camp Union, Sacramento, and in District of California from December, 1864, to muster out.

Company "I"--Ordered to Los Angeles, Cali., December 28, 1861. Expedition from Camp Latham to Antelope Creek April 5-18, 1862 (Detachment). Expedition from Camp Latham to Owens River, Cali., March 19-April 28, 1862. Skirmish, Bishop's Creek, Owens River Valley, April 9. Expedition from Camp Latham to Owens River June 11-October 8. Owens Lake June 24. Moved to Visalia September 29-October 9. At Camp Babbitt, near Visalia, till January, 1864. Ordered to Benicia Barracks January 6, 1864, thence to Camp Union, Sacramento, May 9. Moved to Chico, Cali., June 28-July 18. Duty there and at Camp Bidwell and in District of California till muster out.

Company "K"--Ordered to Utah July 5, 1862. March via Fort Churchill and Ruby Valley to Utah to protect Overland mail route July to November, 1862. Expedition from Fort Ruby, Nev., to Camp Douglass, Utah, September 30-October 29. Affairs on Humboldt River October 11 and 15. Expedition from Camp Douglass to Cache Valley November 20-27, 1862. Cache Valley November 23. Engagement on Bear River, Utah, January 29, 1863. At Fort Ruby and in District of Utah till December, 1864. At Camp Union, Sacramento, till May, 1865. Ordered to Fort Creek May 26, and duty there and in District of California till muster out.

Company "L"--At Fort Churchill December, 1862, to May, 1863. Ordered to Camp Independence May 21, 1863. At Fort Churchill and Fort Bridger till May, 1865. Moved to Fort Laramie, Dakota. Skirmish at Dead Man's Fork June 17. Powder River Expedition July to September, 1865. Garrison duty in District of Utah till muster out.

Company "M"--Ordered to Carson City, Nev., May, 1862. March via Fort Churchill and Ruby Valley to Utah to protect Overland mail route July to September, 1862. Expedition from Fort Ruby to Camp Douglass, Utah, September 30-October 29. Expedition from Camp Douglass to Cache Valley November 20-27, 1862. Cache Valley November 23. Engagement on Bear River January 29, 1863. Expedition from Camp Douglass to Spanish Fork April 2-6. Action at Spanish Fork Canon April 4. Duty at Camp Douglass, Fort Bridger and Camp Connor till May, 1865. Moved to Fort Laramie, Dakota, May, 1865. Dead Man's Fork, Dakota, June 17. On Powder River Expedition July to September and garrison duty in Utah till muster out.

Mustered out July 12, 1866.