With Moscow’s troops close to closing a pincer around Kostiantynivka while Kyiv’s drones gnaw at Russia’s land corridor to Crimea, the war is turning into a test of which side’s supply lines break first.

As Ukraine’s “island strategy” for Crimea bites, Russian commanders are rerouting convoys, repainting trucks, and risking war crimes to keep fuel and munitions trickling to the…

Russian troops rely on supplies via the land corridor to Crimea, but Ukrainian forces are now able to launch concentrated attacks along the critical route. Experts say this…