15th Maine Volunteer Infantry Regiment The 15th Maine Volunteer Infantry Regiment was an infantry regiment that served in the Union Army during the American Civil War . Service . The 15th Maine Infantry was organized in Augusta , Maine December 6 – 31 , 1861 and mustered in January 23 , 1862 for a three - year enlistment . The regiment was attached to Butler ' s New Orleans Expeditionary Corps January to March 1862 . 3rd Brigade , Department of the Gulf , to September 1862 , District of West Florida , Department of the Gulf , to June 1863 . 2nd Brigade , 4th Division , XIX Corps , Department of the Gulf , to December 1863 . 3rd Brigade , 2nd Division , XIII Corps , Department of the Gulf , to January 1864 . 2nd Brigade , 4th Division , XIII Corps , Department of the Gulf , to February 1864 . 2nd Brigade , 1st Division , XIX Corps , Department of the Gulf , to July 1864 , and Army of the Shenandoah , Middle Military Division , to April 1865 . 1st Brigade , 1st Division , Department of Washington , to June 1865 . 2nd Separate Brigade , District of South Carolina , Department of the South , to July 1866 . The 15th Maine Infantry mustered out of service July 5 , 1866 . Detailed service . Moved to Portland February 25 , and there embarked for Ship Island , Miss . , March 6 . Duty at Ship Island , Miss . , until May 1862 , and at Camp Parapet and Carrollton May 19 - September 8 . Moved to Pensacola , Fla . , September 8 , and duty there until June 1863 . Action at Fifteen Mile House , Fla . , February 25 , 1863 , and at Arcadia March 6 . Ordered to New Orleans June 21 , then to La Fourche Landing . Expedition to Thibodeaux June 23 – 25 . At Camp Parapet until August , and provost duty in New Orleans until October . Expedition to the Rio Grande , Texas , October 27 - December 2 . Advance on Brownsville November 3 – 6 . Occupation of Brownsville November 6 . Expedition to Aransas November 14 – 21 . Aransas Pass and capture of Mustang Island November 17 . Fort Esperanza November 25 – 27 . Cedar Bayou November 23 ( detachment ) . Duty at Pass Cavallo Matagorda Island , until February 28 , 1864 . Moved to Franklin , La . , March 1 – 5 . Red River Campaign March 10 - May 22 . Advance from Franklin to Alexandria March 14 – 26 , then to Natchitoches March 26 - April 2 . Battle of Sabine Cross Roads April 8 . Pleasant Hill April 9 . Cane River Crossing April 23 . At Alexandria April 26 - May 13 . Retreat to Morganza May 13 – 22 . Mansura May 16 . Duty at Morganza until July . Moved to Fort Monroe , then to Bermuda Hundred , Va . , July 1 – 17 ( 6 companies ) . Duty in trenches at Bermuda Hundred until July 28 . Deep Bottom July 28 – 30 . Moved to Washington , D . C . , then to Monocacy , Md . ( 4 companies , under Murray and Drew , moved from Morganza to Washington , D . C . , July 1 – 12 . Pursuit of Early July 14 – 24 . Rejoin regiment at Monocacy , Md . , August 4 . ) Veterans on furlough August 5 - October l . Non - veterans temporarily attached to 13th Maine Infantry , and duty at Harpers Ferry until October 5 . Regiment moved to Martinsburg October 5 , and duty there until January 7 , 1865 . Moved to Stevenson ' s Depot , and operations in the Shenandoah Valley until April . Moved to Washington , D . C . , April 19 – 23 , and duty there until May 31 . On provost duty during the Grand Review of the Armies May 23 – 24 . Moved to Savannah , Ga . , May 31 - June 4 , then to Georgetown , S . C . , June 13 – 14 . Duty at Georgetown , Darlington , Cheraw , Chesterfield C . H . , Bennettsville , Columbia and in Districts of Chester , Lancaster , York , Spartanburg and Union until July 1866 . Casualties . The regiment lost a total of 348 men during service ; 5 enlisted men killed or mortally wounded , 3 officers and 340 enlisted men died of disease .