Hussites from Pilsen came to Tábor under the guidance of Břeňek Švihovský and Jan Žižka of . These Hussites were attacked by Catholic knights near Sudoměř on 25 March 1420. The repulsion of the knights encouraged the Hussites, and they managed to reach Tábor, which was still under construction. The Taborites chose four military commanders (Hetmans) from among themselves: Jan Žižka, Mikuláš of Hus, Chval Řepický of Machovice and Zbyněk z Buchov. Under their leadership, the Taborites made many sorties in Southern Bohemia, and at the end of May 1420, they headed towards Prague, threatened by Catholic armies during the first anti-Hussite crusade. In June, Tábor was unsuccessfully besieged by the troops of a Southern Bohemian noble, Oldřich II of Rosenberg. Cavalry led by the governor Mikuláš of Hus dispersed the siege. On 14 July at Vítkov, near Prague, there was a battle in which Jan Žižka managed to thwart an attempt by Hungary and the Holy Roman Emperor Sigismund of Luxembourg to dominate the capital. The crusade then disintegrated without further struggle. In July, the Hussites negotiated about a possible future successor to the Czech throne. In response to the Four Articles of Prague, the Taborites published twelve revolutionary articles in Prague. However, the Praguers did not meet their demands and the troops left the city.