[1][2] The battalion was authorized on 10 August 1914, and embarked for Britain on 29 September 1914.

It formed the nucleus of the Remount Depot on 20 January 1915, and the remainder of the battalion's personnel were absorbed by the Canadian Cavalry Depot, CEF, on 6 March 1915 to provide reinforcements for the Canadian Corps in the field.

[4] The battalion recruited in Portage la Prairie, Roblin, Pipestone and Winnipeg, Manitoba; Lloydminster, Saskatchewan; and Pincher Creek, Alberta; and was mobilized at Camp Valcartier, Quebec.

[8] In 1936, The Border Horse was amalgamated with the 12th Manitoba Dragoons and the perpetuation passed to that regiment.

[3] In 1929 the battalion was awarded the battle honour "The Great War, 1914–15".