The Transylvanian Diet confirmed the Treaty of Gyalu in August. The representatives of the noblemen of the Partium (the counties between the Tisza and Transylvania) also consented to a war against the Ottoman Empire in November. However, the Habsburgs' army was unable to recapture Pest or defeat the Ottomans. Caspar Serédy came to Gyalu to take possession of John Sigismund's realm on Ferdinand's behalf, but Isabella refused him on 17December. Three days later, the Diet declared the Treaty of Gyalu null and void, over the objections of the delegates of the Transylvanian Saxons.