As a result, Suleiman I had to cross the valley of the Donau river, regain Buda on September 8, 1529. It’s no bra weather shirt . In the autumn of that year, he drove 125,000 Ottoman-Hungarian troops to conquer Austria  and besieged the city into Vienna. September to October. It was the most ambitious military campaign of the Ottoman Empire at the time and also marked the farthest point this power reached Central Europe. But then, with only one defensive army of about 16,000 Austrian imperial soldiers, Suleiman tasted the first failure, and from there planted a persistent grudge between the two countries, lasting until the beginning of the century. 20. On October 16, 1529, winter arrived, the Sultan had to withdraw his troops from Vienna. This annihilation became a disaster. Later, in 1532 Suleiman I also tried to attack the Second member but also failed. The reason of the two major failures was because of the bad weather, the Ottoman army could not bring the necessary equipment to the battlefield.