New Russia-Ukraine tensions

[No War, but the War on Christmas]

Honestly, would Ukraine just be better off giving up their claims to the Donbass & Crimea; I realize it would set a terrible precedent to allow Russian aggression to succeed, but I just don't see any realistic way for Ukraine to successfully reintegrate these territories, certainly not at an acceptable cost. And from what I gather, the people in these regions largely want to align with Russia, any way. Perhaps the best solution is some sort of legally recognizable referendum monitored by the international community being held here.