The Home Guard was a British defense organization formed during World War II, primarily composed of volunteers. Established in 1940, it aimed to protect the United Kingdom from potential invasion by enemy forces. Members were typically men who were ineligible for regular military service due to age or other reasons, and they played a crucial role in local defense and civil protection. The Home Guard was often referred to as "Dad's Army" in popular culture, highlighting its diverse membership, which included older men and those with limited military experience. They conducted patrols, manned observation posts, and assisted in emergency services, contributing significantly to the home front during the war.