Mstislav defeated an invading Hungarian army in 1221. In April 1223, the Mongols of Genghis Khan sent an envoy of ten ambassadors to negotiate a surrender or alliance. The Russians haughtily executed them all. The Mongol commanders Subodei and Jebe defeated and captured him three days after the Battle of the Kalka River at a palisade on a nearby hill. According to the Novgorod Chronicle, of the large Russian army sent out to fight the Mongols, only "every tenth returned to his home." For the first time since the attack of the Huns on Europe over seven centuries earlier, an Asian force had invaded Europe and utterly annihilated a major army.