They called it the battle of the Catalaunian plains.

Bt the roman lgionaires here are wearing Trajan's lorica segmentata (Yes, I know that this term i relatively modern, but it is handy), so it can't be later than end of the fourth century, when roman forces due to lack of money, bad quality of legions and new ways of doing wars, as well a growing role of barbarian mercenaries in roman ARMY, THIS ACRION ALMOST HAS DISAPPEARED. At the same time we see oval shields instead of scutums, and the quadrangular shields have disappeared in legions in the 3rd century (Yes, so famous crisis of 3rd century)... We also see that the battle commander has beard, and romans did not have them from Punic wars until Hadrian's times... But who in 3rd century had beard? Or maybe the fourth one? I think of the tetrarchy civil wars period (306-324). This can be Maximianus Herculius fighting against his own son Maxencius...

Ah, that's all senceless! He has stirrups!