 In January 1509, commanding a force of 13 ships, he assaulted the Castle of Coo near Rhodes which belonged to the Knights of St. John.In February 1509, accompanied by the Ottoman privateer Kurtoğlu Muslihiddin Reis (known as "Curtogoli" in the West) and commanding a larger fleet of 20 ships (4 galleys, 1 galleass, 2 galliots, 3 barques and 10 fustas) he assaulted the City of Rhodes and landed a large number of janissaries at the port.In only a few days 4 large assaults are made on the Castle of Rhodes as well as the walls of the citadel that surrounds the city.