After more than four months of ferocious fighting, Russia claimed a key victory: full control over one of the two provinces in Ukraine’s eastern industrial heartland. But Moscow’s rout of the last remaining bulwark of Ukrainian resistance in Luhansk province came at a steep price. The critical question now is whether Russia can muster enough strength for a new offensive to complete its seizure of the Donbas and make gains elsewhere in Ukraine. “Yes, the Russians have seized the Luhansk region, but at what price?” asked Oleh Zhdanov, a military analyst in Ukraine, noting that some Russian units involved in the battle lost up to a half their soldiers. Even President Vladimir Putin acknowledged Monday that Russian troops involved in action in Luhansk need to “take some rest and beef up their combat capability.” That raises doubts about whether Moscow’s forces and their separatist allies are ready to quickly […]