 Complete the following phrase:  In 1241, Hungary was invaded by the Mongols and while the first minor battles with Subutais vanguard probes ended in seeming Hungarian victories, the Mongols finally destroyed the combined Hungarian and Cuman armies at the Battle of Muhi. In 1242, after the end of the Mongol invasion, numerous fortresses to defend against future invasion were erected by Béla IV of Hungary. In gratitude, the Hungarians acclaimed him as the Second Founder of the Homeland, and the Hungarian Kingdom again became a considerable force in Europe. In 1260 Béla IV lost the War of Babenberg Succession, his army was defeated at the Battle of Kressenbrunn by the united Bohemian forces. However, in 1278 Ladislaus IV of Hungary and Austrian troops fully destroyed the Bohemian army at the 