I found this old coin and I don’t know anything about it. Can anyone tell me anything about it? Thanks
It's a late Roman Empire bronze coin of either Constantine the Great (307-337) or one of his three sons (who were confusingly named Constantine, Constantius, and Constans). The reverse shows two soldiers to either side of a military standard and the legend "Gloria Exercitus" (The Glory of the Army). Mintmark at the bottom of reverse seems to be TS for Thessalonika in Greece. A few people here specialize in these coins, and they may be able to give more info.
Quite a common type. I can't make out the obverse legend completely but it's probably Constantinus II or Constantius II. If you want to upgrade, pretty nice examples can be had for $15-$25.