The 2d Battalion 112th Infantry (Mechanized) heritage can be traced back to the Logan Guards (Lewistown) and the Bellefonte Fencibles both organized in 1858. These units were mustered into federal service during the American Civil War. The Logan Guards were mustered as Company E, 25 Volunteers and then as Company A of the 46th Volunteers and the Bellefonte Fencibles were mustered as Company H, 2d Pennsylvania Volunteers.