[1][2][3] On 3 July 1905, the 15th Light Horse was authorized for service and commanded by its founder, Colonel James Walker.
[3] In 1907, an independent troop of the 15th Light Horse was established in Red Deer, Alberta.
On 15 January 1913, the independent squadron became part of the newly raised 35th Central Alberta Horse.
[1][6] At the start of the First World War, the 15th Light Horse was one of 6 cavalry regiments from across Western Canada to provide detachments that helped recruit the 6th Battalion (Fort Garrys), CEF for service with the first contingent of the Canadian Expeditionary Force.
[1][9] The dress uniform of the 15th Light Horse included a scarlet serge frock with yellow collar facings and shoulder straps and dark blue pantaloons with double yellow stripes.