Summary: Army Instructional film emphasising the need for all soldiers to be able to quickly identify tanks and distinguish friendly from enemy vehicles. The film begins with footage of the 1946 victory parade in London, reviewed by King George VI; an ex-soldier then remembers how his Cromwell tank was destroyed by another Cromwell due to misidentification. The film then shows a series of shots from various aspects, including Panther, Centurion, Churchill, Comet, Cromwell and Chaffee tanks. The importance of being able to quickly identify any tank under any circumstances is again stressed.