In 1992 , elements of the Zrinski Battalion took part in the Battle of Kupres , before setting up a training camp in the town of Tomislavgrad . There the battalion personnel assisted in setting up and trained the Croatian Defence Council ( Hrvatsko vijeće obrane – HVO ) . Later that year , elements of the battalion took part in Operation Tiger — aimed at lifting of the Siege of Dubrovnik . In 1993 , elements of the Zrinski Battalion took part in Operation Maslenica , fighting in the area of Škabrnja . The Central Intelligence Agency assessed the Zrinski Battalion as one of the best units of the HV .