The siege lasted from 19 to 21 October, where the Spanish garrison of Ootmarsum under the governor, Otto Van Den Sande, surrendered and was then occupied by the besiegers.

[4] As with the capture of Enschede the same process took place; a Dutch trumpeter under a flag of truce was sent to the gate of Ootmarsum to demand the surrender.

The following evening, Dutch engineers began advancing toward the city's southern ramparts, spending the time positioning two large siege guns.

[4] Van den Sande soon realized his position was hopeless and with no hope of relief, he asked for the written terms of Maurice to be handed over.

[5] This time there was immediate capitulation, and the company of Spanish and German troops consisting of 120 men pulled out of the city, taking with them two banners, two guns, 800 pounds of gunpowder, 2000 fuses, four tons of flour, and other provisions.