On 18 May the Zrinski Battalion was established as a special forces unit of the ZNG, its core consisting of 27 volunteers drawn from the Kumrovec SPU.
The Zrinski Battalion was established as a special forces unit of the ZNG. This was on 18 May. The ZNG was its core. This core was consisting of 27 volunteers. These 27 volunteers were drawn from the Kumrovec SPU.