Blighty one

A Blighty one, also known as a Blighty wound, was a minor injury that was serious enough to take a soldier out of combat, often resulting in the wounded soldier returning home to convalesce. Refers to a wound almost guaranteed to send you home.
 * It was often shortened to just "Blighty."
 * Example: John was one of the lucky ones. He copped a Blighty and was on his way home.