Drugeth's troops plundered the region of Kassa, but they could not capture the town. Rákóczi ordered the mobilization of the local troops. The Cossacks left Hungary before the end of 1619, and Drugeth followed them to Poland in early next year. Ferdinand's army laid siege to Pressburg in October, but Rákóczi hurried to the town and forced the invaders to lift the siege. However, Ferdinand's troops inflicted a decisive defeat on the Bohemian army in the Battle of White Mountain on 8 November. His commander, Bucquoy, invaded Upper Hungary, forcing Bethlen to withdraw his troops as far as Kassa in the first half of 1621. Most Hungarian noblemen sought a reconciliation with Ferdinand, but Rákóczi remained loyal to Bethlen. After Bethlen's opponents seized the fortress of Fülek (now Fiľakovo in Slovakia), Rákóczi laid siege to it in April, but he could not force the defenders to surrender. Bethlen launched a counter-attack against Ferdinand's army in August. Rákóczi joined the military campaign and participated in the siege of Pressburg, but he returned to his family to Sárospatak in late August, only to return a month later at Bethlen's demand.