12th Maine Infantry

== Regimental History and Service Record ==
Organized at Portland and mustered in November 16, 1861. Left State for Lowell, Mass., November 24, thence moved to Boston December 30 and embarked on Steamer "Constitution" for Ship Island, Miss., January 2, 1862, arriving there February 12. Attached to Butler's Expeditionary Corps January to March, 1862. 3rd Brigade, Dept. of the Gulf, to November, 1862. Grover's Division, Baton Rouge, La., Dept. Gulf, to January, 1863. 2nd Brigade, 4th Division, 19th Army Corps, Dept. Gulf, to February, 1864. 1st Brigade, 2nd Division, 19th Corps, Dept. Gulf, to July, 1864, and Army of the Shenandoah, Middle Military Division, to January, 1865. District of Savannah, Ga., Dept. of the South, to March, 1865. 1st Brigade. 1st Division, 10th Army Corps, Army Ohio, to April, 1865. District of Savannah, Dept. South, to April, 1866.
SERVICE.--Duty at Ship Island, Miss., to May 4, 1862. Moved to New Orleans, La., and duty at U.S. Mint until October, 1862. Expedition to Pass Manchac June 16-20. Pass Manchac June 17. Expedition to Ponchatoula (Cos. "C," "D," "F") September 13-18. Pouchatoula September 15. Moved to Camp Parapet October 21, and duty there until November 19. Moved to Baton Rouge, La., and duty there until March, 1863. Operations against Port Hudson March 7-27. Moved to Donaldsonville. Operations in Western Louisiana April 9-May 14. 
* April 11-20, 1863 - The (I) Bayou Teche Campaign 
Porter's and McWilliams' Plantation at Indian Head April 13. Irish Bend April 14. 
* April 18, 1863 - Affair at New Iberia, Louisiana
Advance to the Red River April 20-May 20. Advance on Port Hudson May 21-24. Siege of Port Hudson May 24-July 8. Assaults on Port Hudson May 27 and June 14. Thibodeaux June 20 (Detachment). Surrender of Port Hudson July 9. Donaldsville July 13. Moved to New Orleans August 12, thence to Ship island, Miss., and duty there until October. At Camp Parapet until January 3, 1864. Expedition to Madisonville (Cos. "B," "F," "I," "K") January 3-7. Capture of Madisonville January 7, and duty there until March 11. Ordered to New Orleans March 11. Veterans on furlough April to June 16. Non-Veterans at Camp Parapet until June 16. Veterans moved from Portland to New Orleans May 27, thence Regiment moved to Morganza, La., and duty there until July 3. Moved to Algiers, thence to Fort Monroe, Va., July 13-20, thence to Bermuda Hundred, Va., July 21. Duty in trenches at Bermuda Hundred until July 25. Demonstration on north side of James River July 27-29. Deep Bottom July 27-28. Moved to Washington, D.C., July 31, hence to Tennallytown, Md., August 2. Sheridan's Shenandoah Valley Campaign August 7-November 28. Berryville September 3-4. Battle of Opequan, Winchester, September 19. Fisher's Hill September 22. Battle of Cedar Creek October 19. Duty at Cedar Creek until November 9 and at Opequan until November 19. Non-Veterans left front November 19, and mustered out December 7, 1864. Veterans consolidated to a Battalion of four Companies. Ordered to Savannah, Ga., January 3, 1865, and duty there until April, 1866. Six new Companies organized February and March, 1865, and assigned as "E," "F," "G," "H," "I," "K." Mustered out in February and March, 1866. Regiment mustered out April 18, 1866.
Regiment lost during service 3 Officers and 49 Enlisted men killed and mortally wounded and 2 Officers and 237 Enlisted men by disease. Total 291.
== Regimental Roster ==
== Regiment Statistical Information ==
== Legacy ==
== Notes ==
== Sources == 
* (Pages 745, 746, 1223)
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