Navy Occupation Service Medal

The Navy Occupation Service Medal was a military award of the United States Navy which was "Awarded to commemorate the services of Navy, Marine Corps and Coast Guard personnel in the occupation of certain territories of the enemies of the United States during World War II" and recognized those personnel who participated in the European and Asian occupation forces during, and following World War II. The medal was also bestowed to personnel who performed duty in West Berlin between 1945 and 1990. No more than one Navy Occupation Service Medal may be awarded to an individual.

Source: Wikipedia — Navy Occupation Service Medal (CC BY-SA 4.0)