This collection contains the diary of George H. Marshall, a soldier in Company K, 3rd Pennsylvania Heavy Artillery during the American Civil War. The diary contains short entries spanning one year, beginning with Marshall's enlistment on February 24, 1864. The diary's early entries cover Marshall's enlistment and the movement of his regiment. Later entries, made from Fort Monroe, Virginia, at which the 3rd113th was stationed, relate to the daily routines of Marshall, his regiment, and the fort. Marshall notes such details as the weather, the condition of his health, and his correspondence but also makes mention of prisoners of war, African American troops, the wounded, and skirmishes with the Confederates.