Definition
An Oak Leaf Cluster is not a medal itself, but rather a device awarded to members of the U.S. Armed Forces to denote subsequent awards of the same medal. It's a small bronze (or silver) emblem worn on the medal's ribbon. Think of it like leveling up in a video game and getting an extra badge on your character. It signifies that someone has earned the same award multiple times. It indicates repeated acts of valor or meritorious service.