The 45th Infantry Division was a 2nd Line Territorial Army division during the First and Second World Wars. It was a duplicate of the 43rd (Wessex) Infantry Division. The division was first formed as the 2nd Wessex Division of the Territorial Force in 1914-1915. It became the 45th (2nd Wessex) Division in 1915. During World War II, the division was active in Great Britain throughout its service. It was placed on a lower establishment on 1 December 1941, and finally disbanded on 30 August 1944. The division did not see active service during the war.