the key to krematosk/slovyansk is chasiv yar. it commands the highground south of the settlements, and once it is taken, operations against them, or preparations to surround them, can commence. with pokrovsk and chasiv yar under russian controll, the last piece in the puzzle for northwestern donbass is lyman. i would expect the russian army to take all of these possitions first to try to minimise possible resistance inside this sector before trying to enter or completely surround it.
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