"Battle of Yehuling" . . "50,000 at Wusha Fortress" . . . . . . . "Mongol victory" . . . . . "150,000 elite cavalry" . . . . . . . "800,000 infantry and" . "Battle of Yehuling" . "400,000 at Yehuling" . "light" . . "Mongol Empire" . "Jin China" . . . . . "spread across theGreat Wall" . . . . . "90,000 cavalry" . . "battle of Yehuling" .