The operations in the east were essentially punitive, simply because they didn't support the new government. Yanukovych never sent the army after the protesters, yet the new Kyiv government did... I don't know if you remember the sequence of events, but Donetsk never separated and formed an army until after the massive escalation of violence by the pro-western Ukrainians...
> Oh, and by the way, where did the bodies of 4000 dead Russian soldiers go? Wait, how did they get to Ukraine in the first place?
If you honestly believe the completely incompetent and inept Ukrainian armed forces could kill 4000 Russian soldiers you're insane... The fact they were routed by a separatist force composed mostly of retired soldiers and volunteers with a few Russian advisers, despite having superior numbers and actually having air forces speaks to their competence, or lack thereof. By the way, the ceasefire was called because the Ukrainian military had basically given up, and many, if not most of the soldiers were on the verge of disbanding...
Odds are they didn't even kill that many separatists...