Air Force Distinguished Service Miniature MedalAir Force Distinguished Service Miniature Medal Criteria: The Air Force Distinguished Service Medal (DSM) is granted to any member of of the U. S. Air Force that has defined themselves by exceptional meritorious service to the U. S. government in a duty of great responsibility. This medal is generally granted only to officers that hold at least the rank of Major General. The DSM is often granted to senior Air Force generals, and was designed to