Concini led his 600 soldiers to Szentjobb and captured the fortress on 2 October.
The castellan of Bocskai's other castle, Nagykereki, hired 300 Hajdús, enabling him to defend the fortress against Concini.
Belgioso sent an army against Bocskai, but Bocskai's agents convinced the Hajdús to desert from Belgioso's army, which enabled Bocskai to defeat Belgioso near Álmosd on 15 October.
Belgioso withdrew from the Partium towards Kassa, but the predominantly Protestant townspeople did not allow him to enter the town.
The mayor of the town, Johann Bocatius, persuaded the burghers to let Bocskai's Hajdús come to the town on 30 October.

Bocskai issued a proclamation to the noblemen from Kassa, reminding them of the tyrannical acts of Rudolph and his officials.
The delegates of the counties and towns of Upper Hungary came to Kassa and voted the necessary funds to continue the fight.
Bocskai made the young Calvinist lords, Bálint Drugeth and Ferenc Mágocsy, commanders of his army, and the Catholic nobleman, Mihály Káthay, his chancellor.
Rudolph dispatched Giorgio Basta at the head of an army of 10,000 mercenaries against the rebels.
Basta's disciplined army defeated a troop of Hajdús near Osgyán (now Ožďany in Slovakia) on 17 November.

Gabriel Bethlen came to Kassa on 20 November, accompanied by Lala Mehmed Pasha's envoy, who handed the sultan's ahidnâme (or charter) to Bocskai, which styled him prince of Transylvania.
Lala Mehmed Pasha also sent reinforcements to Bocskai.
Basta defeated Bocskai near Edelény on 27 November, but he could not capture Kassa and withdrew to Eperjes (now Prešov in Slovakia) in early December.
Bocskai sent letters to Transylvania urging the leaders of the Three Nations to support his uprising.
A Unitarian Székely nobleman, János Petki, was the first to join him.
He played a crucial role in convincing the Székelys to forgive Bocskai for the Bloody Carnival of 1596.
A Hajdú captain, Balázs Lippai, who had already questioned Bocskai's leadership, entered into correspondence with Basta.
Bocskai had Lippai captured and executed on 6 January 1605.
He made an alliance with Ieremia Movilă, Voivode of Moldavia, and promised the Székelys that he would restore their liberties, enabling him to secure his rule in Transylvania.
Concini led his 600 soldiers to Szentjobb and captured the fortress on 2 October. The castellan of Bocskai's other castle, Nagykereki, hired 300 Hajdús, enabling him to defend the fortress against Concini. Belgioso sent an army against Bocskai, but Bocskai's agents convinced the Hajdús to desert from Belgioso's army, which enabled Bocskai to defeat Belgioso near Álmosd on 15 October. Belgioso withdrew from the Partium towards Kassa, but the predominantly Protestant townspeople did not allow him to enter the town. The mayor of the town, Johann Bocatius, persuaded the burghers to let Bocskai's Hajdús come to the town on 30 October.
Bocskai issued a proclamation to the noblemen from Kassa, reminding them of the tyrannical acts of Rudolph and his officials. The delegates of the counties and towns of Upper Hungary came to Kassa and voted the necessary funds to continue the fight. Bocskai made the young Calvinist lords, Bálint Drugeth and Ferenc Mágocsy, commanders of his army, and the Catholic nobleman, Mihály Káthay, his chancellor. Rudolph dispatched Giorgio Basta at the head of an army of 10,000 mercenaries against the rebels. Basta's disciplined army defeated a troop of Hajdús near Osgyán (now Ožďany in Slovakia) on 17 November.
Gabriel Bethlen came to Kassa on 20 November, accompanied by Lala Mehmed Pasha's envoy, who handed the sultan's ahidnâme (or charter) to Bocskai, which styled him prince of Transylvania. Lala Mehmed Pasha also sent reinforcements to Bocskai. Basta defeated Bocskai near Edelény on 27 November, but he could not capture Kassa and withdrew to Eperjes (now Prešov in Slovakia) in early December. Bocskai sent letters to Transylvania urging the leaders of the Three Nations to support his uprising. A Unitarian Székely nobleman, János Petki, was the first to join him. He played a crucial role in convincing the Székelys to forgive Bocskai for the Bloody Carnival of 1596. A Hajdú captain, Balázs Lippai, who had already questioned Bocskai's leadership, entered into correspondence with Basta. Bocskai had Lippai captured and executed on 6 January 1605. He made an alliance with Ieremia Movilă, Voivode of Moldavia, and promised the Székelys that he would restore their liberties, enabling him to secure his rule in Transylvania.
Stephen Bocskai