The zone of operations of this Anti-Chetnik battalion was in the territory of Okučani and Stara Gradiška, between river Sava and railway tracks connecting Jasenovac and Novska.
[4] To better counter this kind of Chetniks actions and to return former Partisan units back to their ranks the supreme headquarter of the communist forces in Bosnia and Herzegovina ordered establishment of the Shock Anti-Chetnik Battalions.
[6] The pressure of the Grmeč Anti-Chetnik Battalion forced Uroš Drenović, commander of Petar Kočić Chetnik Detachment to sign an accord with representatives of the Independent State of Croatia on 25 April 1942.
[10] In April 1942 there were two companies of the Shock Anti-Chetnik Battalion composed of recruits from the region below mountain Grmeč[11] with 400 Partisans selected among the best fighters.
[25] The zone of operations of the anti-Chetnik battalion was in the territory of Okučani and Stara Gradiška, between river Sava and railway tracks connecting Jasenovac and Novska.
In August 1943 a group of 25 inmates using the opportunity to tried to escape during cleaning the forest and laying telephone cables in village Drenov Rok.
[29] The cast of Španac played by Mustafa Nadarević in the movie Long Dark Night directed by Antun Vrdoljak was, according to some opinions, in fact Čedo Grbić commessair of the Anti-Chetnik Battalion.