This ruler was defeated at the Battle of Kressenbrunn along with his son, to whom he lost a civil war four years later. A defeat suffered by this ruler was criticized in the eyewitness history Carmen miserabile (“mih-seh-RAH-bih-leh”), written by Roger of Apulia. This ruler consolidated his western territories despite losing the Battle of the Leitha River. This ruler’s cavalry was lured into a swamp at a battle where enemy forces pushed him back with a rolling catapult barrage and outflanked him by building a pontoon bridge. This ruler expelled the Cumans from his kingdom after initially offering them refuge. This ruler’s capital of Esztergom (“ESS-tair-goam”) was sacked during a period known as the Tatárjárás (“TAH-tar-jah-rahsh”), or the “passing of the Tatars.” After this son of Andrew II lost a battle near the Sajó (“SHOH-yoh”) River to Subotai, he founded the city of Buda to resist further invasions. For 10 points, name this Hungarian king whom the Mongols crushed at Mohi. ■END■
ANSWER: Béla IV of Hungary [or Béla IV Árpád; prompt on Béla or Árpád]
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= Average correct buzz position