Russian troops are ramping up pressure on exhausted Ukrainian forces to prepare to seize more land this spring and summer as muddy fields dry out and allow tanks, armored vehicles and other heavy equipment to roll to key positions across the countryside. With the war in Ukraine now in its third year and a vital U.S. aid package for Kyiv slowed down in Congress, Russia has increasingly used satellite-guided gliding bombs — which allow planes to drop them from a safe distance — to pummel Ukrainian forces beset by a shortage of troops and ammunition. Despite Moscow's advantage in firepower and personnel, a massive ground offensive would be risky and — Russian military bloggers other experts say — unnecessary if Russia can stick to smaller attacks across the front line to further drain the Ukraine military.