Complex sentence: In the Air Force, the "V" device is worn on the Bronze Star Medal to denote the decoration is for valorous actions in combat or worn on the Commendation Medal and Achievement Medal for being "placed in harm's way" during contingency deployment operations.
Split into simpler sentences: In the Air Force, the "V" device is worn on the Bronze Star Medal to denote the decoration is for valorous actions in combat. The "V" is worn on the Air Force Commendation Medal and Achievement Medal to denote the decorations were awarded for being "placed in harms's way" during contingency deployment operations.