Following their coordinated uprising, Michael the Brave attacked Ottoman strongholds along the Danube and recovered Giurgiu and Brăila, while Aaron the Tyrant seized Ismail (now in Ukraine). In response, the sultan ordered the Grand Vizier, Sinan Pasha to invade Wallachia. The two princes needed the support of Sigismund Báthory who took advantage of the situation to make himself suzerain of Wallachia and Moldavia. When Aaron the Tyrant refused Sigismund Báthory's conditions, he was replaced by the latter's protégé, Ştefan Răzvan (1595) on the throne.