During the Cold War, a principal focus of Canadian defence policy was contributing to the security of Europe in the face of the Soviet military threat. Toward that end, Canadian ground and air forces were based in Europe from the early 1950s until the early 1990s.
If it is possible to answer this question, answer it for me (else, reply "unanswerable"): What military thread did the CAF protect against in Europe?
the Soviet military threat