Гадячский договор
In 1670 in Ostrog through the local commission, Doroshenko unsuccessfully tried to revive the principles 1658 Treaty of Hadiach in negotiations with Poland. Meanwhile, Khanenko's envoys managed to conclude a treaty with the Poles in Ostrog on 2 September 1670. Soon after the Poles recognized his hetmancy, Khanenko and Jan Sobieski launched a massive invasion onto the Right-bank.