This number decreased significantly through the years as various systems were withdrawn from service. The Honest John was retired by the Canadian Army in 1970. The Bomarc missile was phased out in 1972 and the CF-104 Strike/Attack squadrons in West Germany were reduced in number and reassigned to conventional ground attack at about the same time. From late in 1972, the CF-101 interceptor force remained as the only nuclear-armed system in Canadian use until it was replaced by the CF-18 in 1984.