In Britain, the term was originally applied to the conscription of men during the two World Wars. It is however, generally applied to the compulsory military service following the end of World War II. Men were 'called up' at the age of eighteen and were required to serve for two years in one of the forces. Many saw it as an inconvenience, as it took them away from their jobs or studies. Whilst for others it was the opportunity for learning new skills. A lot of the recruits saw action in conflicts such as The Korean War.
Credit for this entry to: Alan Patient of www.plaquesoflondon.co.uk