With Anzavur's defeat at Yahyaköy, another revolt had broken out in the Adapazarı region. The leaders of this rebellion were (Berzeg) Safer, (Maan) Koc, and (Maan) Ali. The missteps of nationalist forces allowed the scenario to play out similarly to the events of South Marmara. The danger of the situation was recognized by the Nationalist government and ordered to be put down. Ethem was called upon to do so, fresh from putting down Anzavur's rebellion. His forces retook Adapazarı and Sapanca without a fight. On May 26, Ethem entered the town of Düzce and executed both (Berzeg) Safer, and (Maan) Koc; (Maan) Ali however managed to escape.