Million-dollar wound
"Million-dollar wound" or "Blighty wound" is military slang for a type of wound received in combat which is serious enough to get the soldier sent away from the fighting, but neither fatal nor permanently crippling.
Description
In his World War II memoir With the Old Breed, Eugene Sledge wrote that during the Battle of Okinawa, the day after he tried to reassure a fellow United States Marine who believed he would soon die,Writing in his posthumously published World War II memoir Parachute Infantry, paratrooper David Kenyon Webster described how "ecstatic" he was to get the "million dollar wound" in his calf that put him out of action for a couple of weeks but would not permanently disable him.
A similar concept is the Blighty wound, a British reference from World War I. Bridge 6D over the Yser Canal in the Ypres Salient was known as 'Blighty Bridge' from the number of casualties suffered from crossing it at night under fire.