The 45th Battalion (Manitoba), CEF, was an infantry battalion of the Canadian Expeditionary Force during the Great War.
The 45th Battalion was authorized on 7 November 1914, embarked for Britain on 13 March 1916 aboard the SS Lapland and disembarked at Folkestone Harbour on 23 March 1916.
The battalion was stationed at Shorncliffe Army Camp, and provided reinforcements to the Canadian Corps in the field until it was absorbed by the 11th Reserve Battalion, CEF on 6 July 1916.
The 45th Battalion was awarded the battle honour THE GREAT WAR 1916.
The 45th Battalion (Manitoba), CEF, is perpetuated by The 26th Field Artillery Regiment, Royal Canadian Artillery.