Organized at portland and mustered in august 29, 1862. Left state for alexandria, virginia september 3. Attached to the 1st brigade, 1st division, 5th army corps, army potomac, to october, 1862. Then to 3rd brigade, 1st division, 5th army corps, to july, 1865.Battles: battle of antietam, shepherdstown, advance to falmouth, virginia october-november, fredericksburg, expedition to richards and ellis fords december 20-30, mud march, chancellorsviile campaign april 27-may 6, chancellorsviile, gettysburg (pa.) campaign june 12-july 24, aldie, upperville, middleburg, gettysburg, pursuit of lee to manassas gap, virginia, bristoe campaign october 9-22, advance to line of the rappahannock november 7-8, rappahannock station, mine run campaign november 26-december 2, campaign from the rapidan to the james may 3-june 15 1864, wilderness, laurel hill, spotsylvania may 8-12, spotsylvania court house, north anna river, jericho mills, line of the pamunkey may 26-28, totopotomy may 28-31, cold harbour, bethesda church, before petersburg june 16-19, siege of petersburg june 16, 1864, to april 2, 1865, weldon railroad, mine explosion, petersburg, july 30 (reserve), six mile house, weldon railroad, poplar springs church, peeble’s farm, hatcher’s run, warren’s hicksford raid december 7-11, dabney’s mills, hatcher’s run, february 5-7, 1865, appomattox campaign march 528-april 9, white oak road, quaker road, boydton road, five forks, amelia court house, high bridge april 6, appomattox court house, surrender of lee and his army, march to washington, d.C., may 2-12. Grand review may 23. Mustered out–old members, june 4; regiment, july 16, 1865.Regiment lost during service 9 officers and 138 enlisted men killed and mortally wounded and 1 officer and 145 enlisted men by disease. A total loss of, 293 men in service. The flags of this unit follow the known pattern for maine troops during the war. The national flag is a silk example, which is believed to have been carried by the unit at gettysburg. The flag is unusually devoid of adornment, with no battle honours or regimental designation. The regimental flag, follows the nation flag with the eagle as a central image as with the national flag it bears n designation or battle honours. Both flags are held by the maine archives in augusta, maine.