Complex sentence: In 1430 in the Battle of Trnava the army of the Bohemian Hussites defeated the army of the Hungarians, Serbs and Royalists, but the casualties of the Hussites was very strong and the victory was not successful.
Split into simpler sentences: In 1430 in the battle of Trnava the army of the Bohemian Hussites defeated the army of the Hungarians, Serbs and Royalists. But the casualties of the Hussites was very strong and the victory was not successful.