Berton himself was conscripted into the Canadian Army under the National Resources Mobilization Act in 1942 and attended basic training in British Columbia, nominally as a reinforcement soldier intended for The Seaforth Highlanders of Canada. He elected to "go Active" (the euphemism for volunteering for overseas service) and his aptitude was such that he was appointed Lance Corporal and attended NCO school, and became a basic training instructor in the rank of corporal. Due to a background in university Canadian Officers' Training Corps (COTC) and inspired by other citizen-soldiers who had been commissioned, he sought training as an officer.