All of Ali's communications with non-Ottoman regional powers were kept secret, though the ties with Tuscany were likely uncovered by government spies and the failed Tuscan invasion of Chios in 1607 probably riled the new grand vizier, the Empire's most celebrated and feared veteran commander Kuyucu Murad Pasha. The extent to which the Ottomans had become alarmed at Ali's power and alliances compelled them to call a ceasefire with the Habsburgs. Given the approval of Sultan Ahmed I, Murad Pasha kept his plans for a campaign against Ali secret, with no contemporary record or reference in Ottoman official correspondence of Ali's disloyalty to the Empire or rebellion. He launched his expedition against Ali from Uskudar on 10 July 1607, ostensibly with the purpose of regaining territory lost to the Safavids.