Alan Military Tactics

[Flavivs Aetivs]

Marriages were a good way to cement politics and alliances - Attila's wife Ildico was a marriage to cement an alliance.

However, I think Arianism was more popular because the Transition takes time from Polytheism to Monotheism. The Romans were already beginning more monotheistic practices (Mithras, Sol Invictus, etc) when Christianity was made legal.

the Barbarians went to Arianism likely because it preserved some of their Polytheistic practices, and the Transition was easier.