As it says on the can, what if the 1968 reorganization of the Canadian military did not lead to the complete unification of the three services (RCN, RCAF and Canadian Army) into the Canadian Forces? What would be the knock-on effects of a more rational and less controversial reorganization?
For an easy POD to get us there, given that Defense Minister Hellyer is a WWII vet, say that during the war he gets himself killed, either in combat or in an accident.