Following the Battle of Mohács, the Kingdom of Hungary became divided between the Ottoman Empire encroaching from the East and the Habsburg Monarchy which had inherited the title of King of Hungary. The Ottoman vassalJohn I of Hungary died in 1540, and his son John II, who was at that time a minor, was crowned king under the regency of his mother Isabella Jagiellon and bishopGeorge Martinuzzi. This was accepted by the Ottoman ruler Suleiman the Magnificent under the condition that the Hungarians would continue to pay tribute to the Ottoman Sultan. The new king was however not accepted by the Habsburgs. Ferdinand I, Austrian Archduke and a Habsburg, sent an army of 50,000 composed of troops from Austria, German Principalities, Bohemia, and Habsburg Hungary and commanded by Wilhelm von Roggendorf to besiege Buda. The army besieged Buda in Summer 1541. The siege was badly managed and several attacks failed with very high numbers of casualties on the Habsburg side. Suleiman the Magnificent took personal command of an Ottoman relief army which included 6,362 Janissaries. On 21 August, the Ottoman relief army reached Buda and engaged in battle with Roggendorf's army. The Habsburg army was defeated and 7,000 men were slaughtered or drowned in the river. Roggendorf was also wounded in the battle and died 2 days after of his injuries. The Ottomans then occupied the city, which in its turn was celebrating the liberation, with a trick: Suleyman invited the infant John II Sigismund Zápolya with the Hungarian noblemen into his tent, meanwhile the Turkish troops began to slowly infiltrate into the fort as "tourists" seemingly in admiration of the architecture of the buildings. However, at a sudden alert they wielded their weapons and disarmed the guards and the whole garrison thereafter. At the same time, the Hungarian noblemen felt uncomfortable in the sultan's tent and wanted to leave. In that moment, on the outcry of the sultan "The black soup is still to come!" the Turkish soldiers disarmed the Hungarian envoy. All of them were allowed to leave with one exception: Bálint Török, whom Suleyman considered a possible powerful opponent. He was taken into captivity and was transferred to Yedikule Fortress, where he spent his remaining life. The Royal Court, the noblemen, and citizens of Buda were allowed to leave the city with their possessions unharmed. The Habsburg army lost in all 16,000 men.
