I'd say this is an AE3 of Arcadius struck around 395-401. I'm not able to read the mintmark in exergue on reverse to get the exact RIC reference. Have a look at RIC X for reference of your coin.
Obverse - D N ARCADIVS P F AVG, Bust of Arcadius, right, diademed, draped, cuirassed.
Reverse - VIRTVS EXERCITI, Emperor standing, holding spear and leaning on shield, crowned by Victory.
Here are two variants of your coins:
- https://en.numista.com/catalogue/pieces62805.html
- https://en.numista.com/catalogue/pieces62624.html
Sapientiae plerumque stultitia est comes.
Si c'est un grand plaisir d'être reconnu par ses amis, c'est peut-être encore plus flatteur d'être reconnu par ses adversaires.
Be yourself; everyone else is already taken.