Berton spent the next several years attending a variety of military courses, becoming, in his words, the most highly trained officer in the military. He was warned for overseas duty many times, and was granted embarkation leave many times, each time finding his overseas draft being cancelled. A coveted trainee slot with the Canadian Intelligence Corps saw Berton, now a Captain, trained to act as an Intelligence Officer (IO), and after a stint as an instructor at the Royal Military College in Kingston, Ontario, he finally went overseas in March 1945. In the UK, he was told that he would have to requalify as an IO because the syllabus in the UK was different from that in the intelligence school in Canada. By the time Berton had requalified, the war in Europe had ended. He volunteered for the Canadian Army Pacific Force (CAPF), granted a final "embarkation leave", and found himself no closer to combat employment by the time the Japanese surrendered in September 1945.