It is clear that Putin's goal is to rebuild either the Soviet Union or Imperial Russia, I don't think he cares which one it is as long as he's on top. Accordingly he does not want peace in Ukraine, he wants to take it over. Given President Obama's comments on lines in the sand in Syria and the like, I don't think he sees in downside to making the attempt. To be fair, I hope we stay out of this one, war with Russia will get ugly fast.
Band, do you have a picture of these guys? If they're wearing camo, take a close look for insigna, its there but also camouflaged.