[Alucard scowls, very clearly unimpressed. Whatever he is thinking, he is careful to keep it to himself, but his narrowed gaze is a judgemental one.]

A peace treaty is far easier to betray than the unity of two regions, from my experience. The argument displayed for the empires is who is the true ruler. If both rule in a married union, the argument is irrelevant.

The problem was created due to two universes becoming one -- messily. A political marriage simplifies the matter significantly, a practice that I doubt would interfere with their traditions.