Constantius II, AE4, Trier. 337-341 AD.

FL IVL CONSTANTIVS AVG, laureate, cuirassed bust right.
GLORI-A EXER-CITVS, two soldiers holding spears and shields with one standard between them with O on banner.
Mintmark: TRS palm branch

RIC VIII Trier 82
Rated R2.

(I think this one is from Heather of aeqvitas.com)