 Since the Ottoman army outnumbered the forces at Sigismund's disposal, he proposed the Székely commoners (who had been reduced to serfdom in the 1560s) to restore their freedom if they joined his campaign against the Ottomans.The Székelys accepted his offer, enabling Sigismund to launch a counter-invasion in Wallachia in early October.The united forces of Transylvania, Wallachia, and Moldavia defeated the retreating Ottoman army in the Battle of Giurgiu on 25October.