The 139th Battalion, CEF was a unit in the Canadian Expeditionary Force

Canadian Expeditionary Force

The Canadian Expeditionary Force was the designation of the field force created by Canada for service overseas in the First World War. Units of the C.E.F. were divided into field formation in France, where they were organized first into separate divisions and later joined together into a single...

 during the First World War

World War I

World War I , which was predominantly called the World War or the Great War from its occurrence until 1939, and the First World War or World War I thereafter, was a major war centred in Europe that began on 28 July 1914 and lasted until 11 November 1918...

. Based in Cobourg, Ontario

Cobourg, Ontario

Cobourg is a town in the Canadian province of Ontario, located in Southern Ontario 95 km east of Toronto. It is the largest town in Northumberland County. Its nearest neighbour is Port Hope, to the west. It is located along Highway 401 and the former Highway 2...

, the unit began recruiting in late 1915 in Northumberland County. After sailing to England in September 1916, the battalion was absorbed into the 3rd and 36th Reserve Battalions on October 6, 1916. The 139th Battalion, CEF had one Officer Commanding: Lieut-Col. W. H. Floyd.