The Battle of Vassilika in 1821 marked an early turning point in the war.
The Turkish Ottoman Empire laid siege to Vienna for the first time on September 27, 1529. However, Fernando I, Emperor of the Holy Roman Empire, won the support of Carlos V of Spain and the Prussians so he was able to repel the Turkish invasion in the Vienna streets.
Suleiman laid siege to Vienna in 1529.
Three years later, in 1532, the Turks attacked again to Vienna. If they had defeated Vienna, they would have taken over Central Europe. Austria was very weak.
Carlos V of Spain, who was the brother of Ferdinand I, Archduke of Austria; King of Hungary and Bohemia; and Emperor of the Holy Roman Empire, had to send Spanish troops under the Duke of Alba to beat back the armies of Suleiman. Ferdinand of Austria and Carlos of Spain were brothers and sons of Philip "The Handsome".
One hundred and fifty years of hostilities between Turks and Germanic ended in the Battle of Vienna. The Turks captured Constantinople, now Istanbul, and seized Eastern Europe.
They wanted to capture the heart of Europe and else. Suleiman wanted first to become the king of Hungary, and then absorb the Holy Roman Empire.