Complex sentence: In 1260 Béla IV lost the War of Babenberg Succession, his army was defeated at Battle of Kressenbrunn by the united Czech troops, however after in 1278, Ladislaus IV of Hungary and Austrian troops fully destroyed the Czech army at Battle on the Marchfeld.
Split into simpler sentences: In 1260 Béla IV lost the War of Babenberg Succession, his army was defeated at the Battle of Kressenbrunn by the united Czech forces. However, in 1278 Ladislaus IV of Hungary and Austrian troops fully destroyed the Czech army at the Battle on the Marchfeld.