In 1911, the regiment transferred two of its squadrons (in Saskatoon and Allan) to the newly formed 29th Light Horse.
[2][3][4][5] At the start of the First World War, the 22nd Saskatchewan 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.
On 22 September 1915, the 1st Regiment, CMR, disembarked in France where it fought as part of the 1st Brigade, Canadian Mounted Rifles.
After its arrival in the UK, on 22 May 1916, the regiment's personnel were absorbed by the Canadian Cavalry Reserve Depot, CEF.
[2][3][4][12][13] The officers and other ranks of the 22nd Saskatchewan Light Horse for their full-dress uniform wore a scarlet serge frock with white collar facings and shoulder straps and dark blue pantaloons with double white stripes.