The ministry said Thursday the prize recognizes the student whose performance is the best among their peer group.
Known in the military as Capt. Wales, the third-in-line to the British throne was awarded his prize Wednesday.
The prince, who trained in California, in southern Arizona and in Britain, will now fly Apaches on exercises in the U.K.
In December, a British newspaper said Harry had acknowledged he will be deployed to Afghanistan for a second time. He briefly served there from 2007. The defense ministry has declined to confirm details of the prince's future deployments.
