Coins on Military Graves
The coins left on a service member's headstone are a silent message from someone who came to visit — and each denomination says something specific about how they knew the fallen.
How it actually works
Walk a military cemetery and you'll find coins pressed onto headstones. They're left deliberately, and the denomination is the message. A penny means someone visited — "I was here, you're remembered." A nickel means they went through boot camp or training with the fallen. A dime means they served together. A quarter is the heaviest: it means the person who left it was there when the service member died. The coins aren't taken as litter — cemeteries typically collect them and put them toward grounds upkeep or veterans' causes.
Two honest caveats. First, this is a folk tradition, not official DoD or VA policy — the penny/nickel/dime/quarter code is passed down informally, and you'll find slightly different versions of it. It's real and widely honored; it just isn't codified in any regulation. Second, the roots run much deeper than the U.S. military: leaving coins for the dead goes back to antiquity — the coin to pay Charon to ferry a soul across the River Styx. The modern American practice is usually traced to the Vietnam era, when the political climate made it painful for troops to approach a fallen friend's family directly, so a coin on the stone became a way to say "I was here" without a word.
Ancient (coins for the dead); modern U.S. practice traced to the Vietnam War