 The Canadian Armament and Research Development Establishment (CARDE), was formed as a joint Canadian-British operation to study artillery and ballistics, in an effort to harness the intellectual resources of Canada, as well to place developing British technology outside of German reach during World War II.Formed up on a military training area and artillery range outside Valcartier, northwest of Quebec City, CARDE was one of a number of research divisions of the DRB that were well funded in the immediate post-war era.CARDE was researching supersonic flight and a variety of rocket and missile projects when Bull was asked to join.