3rd Canadian Division Support Base Detachment Wainwright, commonly referred to as Canadian Forces Base Wainwright or CFB Wainwright, is a Canadian Forces Base in Denwood, Alberta, adjacent to the town of Wainwright.

The 583 km² (225 sq mi) Buffalo National Park was closed in 1940 and the property leased by the Government of Alberta to the Department of National Defence (DND) for the creation of an ammunition storage facility as well as an army training camp. DND owned an adjacent 75 km² (29 sq mi) property and used the facility for live-fire artillery, armoured and infantry training.

Called Wainwright Military Camp, or just Camp Wainwright, after the nearby Canadian National Railways division point, the facility saw use from January 29, 1945, to May 24, 1946, as a prisoner of war (POW) internment camp for 523 captured German officers, soldiers and civilians from its first day of operation to 1,100 POWs at its peak. During the 16 months the POW camp was in full operation, only two prisoners made a successful escape, although they were recaptured just over a month later, but not until they had reached Gary, Indiana.

Decommissioned as a POW internment camp in 1946, Camp Wainwright reverted to a Canadian Army training facility. The camp staff and guard company were reduced to nil strength a few weeks later, marking the end of this chapter of CFB/ASU Wainwright's history. Wainwright's infrastructure expanded significantly during the Korean War as buildings were constructed to house and train soldiers in three Canadian Army battalions, as well as units that would form British Commonwealth Forces Korea such as the 25th Canadian Infantry Brigade.

The February 1, 1968 merger of the Canadian Army, Royal Canadian Navy and Royal Canadian Air Force to form the Canadian Forces was predated by a number of major changes to Canada's military structure. One of these saw Camp Wainwright transferred on January 1, 1967, to become an auxiliary satellite training camp of CFB Calgary. This was reverted on August 1, 1967, due to command and control problems, and Camp Wainwright became Canadian Forces Base Wainwright (CFB Wainwright) as a separate entity within the establishment of CFB Calgary.

An airfield was opened at CFB Wainwright in October 1967 and at the time of official unification, CFB Wainwright became a component of Training Command as the facility was tasked as a training area. CFB Wainwright offered both officer and basic training courses, battalion-level unit operations and acted as a host for training foreign detachments. Wainwright also offered administrative support services for 1 Canadian Brigade Group units.

Subsequent changes to the force structure saw Wainwright's role as a training facility evolve, particularly as the garrisons at CFB Calgary and CFB Edmonton shifted some of their training to the newly established and much larger CFB Suffield.

On July 15, 1974, the 1 Combat Group Operational Training Detachment was formed at CFB Wainwright to conduct individual training for two or more units of Mobile Command's 1 Combat Group.