3rd, 4th, 5th & 6th Regiments, Canadian Mounted Rifles
In April 1902, the British requested from Canada a fourth contingent of 2,000 men recruited and funded on the same basis as the 2nd Regiment, Canadian Mounted Rifles. The contingent was recruited in April 1902 and organized into four regiments of Canadian Mounted Rifles. Each regiment had 26 officers, 483 men and 539 horses, organized into a headquarters and four squadrons. The contingent therefore could field 16 squadrons, three more than the combined strengths of the second and third contingents, plus Strathcona's Horse.
Each regiment was commanded by a veteran of previous service in South Africa, and included a large number of veterans in both its commissioned and non-commissioned ranks. These units arrived in South Africa after the war had ended, however, and returned to Canada in July 1902 at which time they disbanded.