Looks like it might be Roman to me. Looks like it might be a "Victory, advancing" reverse type, similar this:
That one happens to be a Trajan denarius (AD 101-102) but it's a common reverse type on Roman Imperial coinage in both silver and bronze, over several centuries and multiple Emperors. The obverse is too corroded to say much more.
Is where you found it consistent with a Roman coin find?
Looks more like Red-Coats example to me. Standing not sitting. Looking forward to a possibly positive ID. In either case, it looks pretty darn old. Nice find.
Yes, I'd say Roman too. Did you find it in Virginia? If so, folks used to pay big bucks for these in coin collections of old. I have found (I think) two in the US. A friend found several also.
It is a Victory Advancing Left Reverse type. The obverse would need at least some letters to ID the Emperor but these AE3 are part of the Valentinian family, circa AD364-378.