The Archduke of Austria, based on the provisions of the First Congress of Vienna, also declared his claim to the Czech and Hungarian crowns and occupied Hungary in the summer of 1528.

The Turks helped him recapture Upper Hungary, and they themselves began to occupy the Hungarian domains of Northern Bosnia, Slavonia, and Croatia.

The Turks did not recognize the Habsburgs as the bearers of the Hungarian crown and considered Ferdinand to be only Charles V the seat of the emperor and not an independent leader and had no right to call himself king and demand anything.

The earliest the Ottomans could reach Habsburg Hungary was in July, thus leaving only three and a half months of hostilities, as the troops refused to fight[6][7] once the autumn rains began.

Ferdinand's continued attempts to conquer Hungary, in particular the unsuccessful siege of Buda by the Habsburg commander Rogendorf in late 1530, made the sultan again want to organize a new raid on Vienna.

[13] Conquering a number of Hungarian fortresses, the Ottoman army approaches Köseg (Güns)[Note 1] on August 5, which was defended by a garrison (700 men) under the command of Nikolay Jurišić.

Akinji forces empty Styria, Carinthia, attack Gratz, Friedberg, Kirchberg, Hartberg and other cities, even invade Upper Austria.

The imperial troops of Joachim Brandenburgz inflict several defeats on the Turks, force them to retreat and encircle and destroy 10,000 Turkish rearguards in Leobesdorf on September 19, including Kasim Bey, one of the leaders of the raid.

Preoccupied with the attack of Andrea Doria's imperial fleet on the Morea and preparations for a new war with Iran, the sultan agreed to a peace in January 1533, and after the archduke's messenger handed over the keys to Esztergom, agreed to sign a peace treaty with Ferdinand: recognizing him as King of Hungary equal to Johan Zapolya.

The implementation of the provisions of that treaty in 1540 led to the Ottoman–Habsburg War (1540–1547) The hereditary lands of the Habsburgs are severely crushed, which was most likely the Ottomans' goal, as it weakened Ferdinand's position in the struggle for Hungary.

According to scholars, the total loss of life in Austria and Styria, killed and enslaved during the Ottoman–Habsburg War, is about 200,000, and it took several decades for the economy to recover.