The Battle of Trnava or Battle of Nagyszombat took place during the Hussite Wars between the Hussites and the Hungarian-Royalists-Serbian army near Trnava (Nagyszombat) in the Kingdom of Hungary (today in Slovakia). The battle was fought in three phases, on 23, 25 and 28 April 1430 and ended in Hussite victory. In the summer of 1430, 10,000 Hussites from Moravia invaded Hungary under Velek Koudelník of Březnice.