Organized at Indianapolis, Ind., July 24, 1861, as 21st Indiana Infantry. Left State for Baltimore, Md., July 31, and duty in the Defences of that city till February 19, 1862. Attached to Dix's Division, Baltimore, Md., to February, 1862. Butler's New Orleans Expedition to March, 1862. 2nd Brigade, Dept. of the Gulf, to October, 1862. Independent Command, Dept. of the Gulf, to January, 1863. Unattached, 1st Division, 19th Army Corps, Dept. of the Gulf, to February, 1863. Designation changed to 1st Heavy Artillery February, 1863. Artillery, 1st Division, 19th Army Corps, to August, 1863. District of Baton Rouge,La., Dept. of the Gulf, to June, 1864. Unattached, 19th Army Corps, and Unattached, Dept. of the Gulf, to January, 1866.
SERVICE:
Expedition to Eastern Shore of Maryland November 14-22, 1861. Moved to Newport News, Va., February 19, 1862; thence sailed on Steamer "Constitution" for Ship Island, Miss., March 4-13. Duty at Ship Island till April 14. Operations against Forts St. Phillip and Jackson, April 14-28. Occupation of New Orleans May 1 (first Regiment to land). Camp at Algiers till May 30. Expedition to New Orleans and Jackson R. R. May 9-10. Moved to Baton Rouge May 30, and duty there till August 20. Battle of Baton Rouge, La., August 5. Evacuation of Baton Rouge August 20. Camp at Carrollton till October. Action at Bayou des Allemands September 4-5. Expedition from Carrollton to St. Charles Court House September 7-8. Skirmish near St. Charles Court House September 8. Expedition from Carrollton to Donaldsonville and skirmish October 21-25. Duty at Berwick Bay till February, 1863. Bayou Teche November 3, 1862. Action with Steamer "Cotton" Bayou Teche January 14, 1863. Operations in Western Louisiana April 9-May 19. Teche Campaign April 11-20. Fort Bisland April 12-14. Advance on Port Hudson May 20-24. Siege of Port Hudson May 24-July 9. Assaults on Port Hudson May 27 and June 14. LaFourche Crossing June 20-21 (Co. "F"). Brashear City June 23 (Co. "F"). Expedition to Sabine Pass, Texas, September 4-11 (Detachment). Garrison duty at New Orleans, Baton Rouge and at various points in the Dept. of the Gulf till February, 1865. Companies "L" and "M" organized August 12 to November 2, 1863. Red River Campaign March to May, 1864 (Cos. "G" and "H"). Blair's Landing April 12-13 (Detachment). Monett's Ferry, Cane River Crossing, April 23 (Detachment). Retreat to Morganza May 13-20. Operations in Mobile Bay, Ala., against Forts Gaines and Morgan August 2-23 (Cos. "B," "F," "H" and "K"). Siege and capture of Fort Gaines August 3-8. Siege and capture of Fort Morgan August 8-23. At New Orleans, La., till March, 1865. Campaign against Mobile, Ala., and its defences March 17-April 12, 1865. Siege of Spanish Fort and Fort Blakely March 26-April 8. Fort Blakely April 9. Occupation of Mobile April 12, and duty there till June 24. Garrison duty till January, 1866. Companies "B" and "C" at Fort Morgan, "H" and "K" at Fort Gaines, "F" and "L" at Barrancas, Fla.; "I" and "M" at Fort Plckens, Fla.; "A," "E" and "G" at Baton Rouge, La., and "D" at Port Hudson, La. Mustered out at Baton Rouge, La., January 10, 1866.
Regiment lost during service 7 Officers and 60 Enlisted men killed and mortally wounded and 3 Officers and 320 Enlisted men by disease. Total 390.