During World War II she ran away from home, aged 15, to join the Canadian Women's Army Corps, a unit formed to release men for combat duties. CWAC personnel were secretaries, vehicle drivers, and mechanics, who performed every conceivable noncombat duty. Maxwell quickly became part of the Army Show in Canada. Later, as part of the Canadian Auxiliary Services Entertainment Unit, she was posted to the United Kingdom, where she performed music and dance numbers to entertain the troops, often appearing alongside Canadian comedians Wayne and Shuster.