United States Regiments & Batteries * U.S. Regulars
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1861
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| January | Duty at Fort Duncan, Eagle Pass, Texas |
| February 20 | Moved to Fort Jefferson, Fla. |
| May 24 | To Fort Pickens, Fla. Attached to District Fort Pickens and Pensacola, Fla., Dept. South. |
| November 22-23 | Bombardment of Forts McRae and Barrancas, Pensacola Harbor |
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1862
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| January 1 | Bombardment of Forts McRae and Barrancas, Pensacola Harbor |
| January 27-31 | Reconnaissance on Santa Rosa Island |
| May 9 | Capture of Forts McRae and Barrancas |
| May 13 | Moved to Pensacola |
| August 30 | Moved to New Orleans, La.Attached to Defenses New Orleans, La., Dept. Gulf |
| September 3 | Moved to Baton Rouge, La. and attached to Grover’s Division, Dept. of the Gulf |
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1863
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| January | Attached to Artillery, 4th Division, 19th Army Corps, Dept. Gulf |
| March 7-27 | Expedition to Port Hudson |
| April 9-May 14 | Operations in Western Louisiana |
| April 11-20 | Teche Campaign |
| April 12-13 | Fort Bisland |
| April 14 | Porter’s and McWilliams’ Plantation at Indian Bend and Irish Bend |
| April 17 | Bayou Vermillion |
| April 17-21 | Expedition to Breux Bridge and Opelousas |
| May 5-16 | Expedition to Alexandria and Simsport |
| May 18-23 | Moved to Port Hudson |
| May 24-July 9 | Siege of Port Hudson |
| May 27 | Assault on Port Hudson |
| June 14 | Second Assault on Port Hudson |
| July 9 | Surrender of Port Hudson |
| July 13-August 2 | Moved to Baton Rouge and attached to Artillery Reserve, 19th Army Corps |
| September 4-12 | Sabine Pass Expedition |
| October 3-November 17 | Western Louisiana Campaign |
| November | At New Iberia |
| December | Moved to New Orleans |
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1864
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| January | Attached to Artillery, 1st Division, 19th Army Corps |
| March 10-May 22 | Red River Campaign |
| March 14-26 | Advance from Franklin to Alexandria |
| April 8 | Battle of Sabine Cross Roads |
| April 9 | Pleasant Hill |
| April 23 | Monett’s Ferry, Cane River Crossing |
| April 30-May 10 | At Alexandria during construction of dam |
| May 13-20 | Retreat to Morganza |
| May 15 | Marksville |
| May 16 | Avoyelle’s Prairie, Mansura |
| May-June | At Morganza |
| July 27-August 5 | Moved to New York, then to Washington, D.C. |
| August | Attached to Defenses Washington, 22nd Army Corps |
| August | Sheridan’s Shenandoah Valley Campaign. Attached to Horse Artillery, Army of the Shenandoah, Middle Military Division |
| August 25 | Near Kearneysville |
| August 28 | Leetown and Smithfield |
| August 29 | Smithfield Crossing, Opequan |
| September 15 | Savior’s Ford, Opequan |
| September 19 |
Third Battle of Winchester (Opequan) |
| September 21 |
Fisher’s Hill |
| September 22 | Milford |
| September 23-24 | Mt. Jackson |
| September 26-27 | Port Republic |
| October 19 |
Battle of Cedar Creek |
| October-August | Duty in the Shenandoah Valley and in the Defenses of Washington, D.C. |
| December | Attached to Horse Artillery (Reserve), Army Shenandoah |
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1865
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| April | Attached to Cavalry Brigade, Army Shenandoah until August, 1865 |