Cingulum

The Belt That Says “Soldier”
The cingulum did more than keep a Roman soldier’s tunic from flapping. It was a core piece of his kit, and part of how he looked like a soldier.
Military belts could be dressed with metal plates, buckles, and fittings, and some had hanging leather straps studded with metal at the front. Besides looking impressive, the belt gave the soldier somewhere to hang gear, like his pugio, or dagger.
The belt also spoke for the man wearing it. A decorated military belt was a visible sign of a soldier’s profession and status. Even without helmet, shield, and armor, it marked him as a military man.
So the cingulum did three jobs rather well: it held things, carried things, and made sure everyone knew a Roman soldier had just walked into the room.