Stationed at Fortress Monroe, Virgina., January 1861. 
Stationed at Fort Pickens and Pensacola, Florida., Dept of the South, June 1961 to September 1862. 
Defenses of New Orleans, Louisiana, Dept. Gulf, February 1863. 
Artillery 1st Division 19th Army Corps Dept. Gulf, August 1863. 
Defenses of New Orleans, Louisiana, January, 1864. 
Artillery 1st Division 19th Army Corps, Dept. Gulf, 
August, 1864.
Embarked of Steamer "Brooklyn" for Fort Pickens, Florida January 24, 1861, arriving in Pensacola Harbor February 6th.  Garrison duth at Fort Pickens until May, 1862.  Action on Santa Rosa Island October 9, 1861.  Bombardment of Forts McRae and Barrancas, Pensacola Harbor, November 22-223, 1861, and January 1, 1862.  Capture of Forts McRae and Barrancas May 9.  Moved to Pensacola May 13, and duty there until August.  Moved to New Orleans, Louisiana, August 30 to September 3, and duty in the defenses of that city until January, 1863.  Expedition to Bayou Teche January 11-18,.  Engagement with Steamer "Cotton" January 14.  Moved to Baton Rouge, Louisiana, expedition against Port Hudson March 7-27. Operations in Western Louisiana April 9-May 14.  Teche Campaign April 11-20.  Fort Bisland, near Centerville.  April 12-13, Jeanerette April 14.  Vermillion Bayou  April 17.  Espedition to Alexandria  and Simsport May 5-16.  Moved to Port Hudson May 18-23.  Siege of Port Hudson May 24-July 9.  Assaults on Port Hudson May 27 and June 14.  Surrender of Port Hudson July 9.  Moved to Donaldsville July 13, thence to Baton Rouge, Louisiana, August 2.  Sabine Pass (Texas) Expedition September 2-12.  Duty at New Orleans, Louisiana, until January , 1864.  Expedition to Madisonville  January 3.  Garrision dutu at New Orleans until July.  Moved to New York July 27-August 3, thence to Washington, D.C.  Consolidated with Battery "F", 1st Artillery, and remounted.  Duty in the Defenses of Washington, D.C., 22nd Corps, until September, 1865, when resumed separate organization.
 Historic image of the Port Hudson battlefield and Capt. Edmund C. Bainbridge's Battery A, 1st U.S. Artillery, 1863
Courtesy of National Archives