Following Ferdinand I's daring assault on Ottoman Hungary, Suleiman launched a campaign to take the Austrian capital Vienna and thereby strike a decisive blow, allowing him to consoldiate his hold on Hungary.

March

Suleiman's march to Vienna was also an attempt to assist his vassal, John Szapolyai who claimed the throne of Hungary. Suleiman sent his army of 120,000 strong north on the 10 May 1529 . His campaign was marked by speedy success- on September 8 Buda surrendered to the Ottomans and John Szapolyai was installed as King of Hungary. Suleiman then went further taking Gran, Tata, Komoron and Raab so that much of Ferdinand I's gains the previous two years were lost. On 27 September, Suleiman reached Vienna.

Aftermath

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. However, when Suleiman began besieging Vienna it would prove to be his first and most decisive blunder.