 Complete the following phrase:  Nash enlisted in the Union Army on September 10, 1861, mustering into Company D of the 27th Regiment Massachusetts Volunteer Infantry ten days later. Nash stayed in the Army for the remainder of the American Civil War, re-enlisting when his initial term of enlistment expired in 1863. Through the course of the war, he participated in twenty battles, and was eventually promoted to the rank of Sergeant. Nash was wounded in action at 