 It engaged in "eleven bloody and hard-fought battles" including the First Battle of Bull Run, where it was the last regiment to leave the field, and Fredericksburg, where it took its greatest number of casualties.When the regiment was mustered out in Bangor, huge crowds gathered to celebrate its return on Broadway, and a ceremony was held at Norumbega Hall downtown.Those soldiers who had enlisted for three years, rather than two, were transferred to the 20th Maine Volunteer Infantry Regiment under protest.