You do not declare wars against armies. Wars are declared against nations. Russia has no qualms about hitting Ukrainian infrastructure, the Ukraines need to be allowed to take the gloves off and hit back at any and every factory, pipeline, refinery, bridge, airport and train line used by the Russians for the war effort, whether it produces munitions, energy, food or boots. As things stand, the best Ukraine can hope for is a stalemate with a loss of territory to the Russians and a promise of more to come when the Russians rearm in a decade or two。