 Suleiman then went further taking Gran, Tata, Komárom and Raab so that much of Ferdinand I's gains the previous two years were lost.On 27 September, Suleiman reached Vienna.The arrival of the Sultan's massive host in Central Europe caused much panic across Europe - Martin Luther, who had believed that the Turks were God's punishment against the sins of Christians modified his views and wrote the book "the War with the Turks" in 1529 urging that "the scourge of God" should be fought with great vigour.