The Defence Medal is a campaign medal instituted by the United Kingdom in May 1945, to be awarded to citizens of the British Commonwealth for both non-operational military and certain types of civilian war service during the Second World War.

The Home Guard was an armed citizen militia supporting the British Army during the Second World War. Operational from 1940 to 1944, the Home Guard had 1.5 million local volunteers otherwise ineligible for military service, such as those who were too young or too old to join the regular armed services and those in reserved occupations. Excluding those already in the armed services, the civilian police or civil defence, approximately one in five men were volunteers. Their role was to act as a secondary defence force in case of invasion by the forces of Nazi Germany.