Combat zone - ARMAFinland/Arma3-Basic-Afi-Mission-framework GitHub Wiki
Combazone is system what gives players notifications and plays speaking sound what can be heard by others, when they leave the area.
It will connect the markers with thin red line.
You can create combatzone using module named Tun Combat Zone.
You need to place multiple markers with prefix_1,2,3,4...
Easiest way to do this is to create marker with only the prefix of your choice, lets say you use blufor, then you just copy and paste it and arma will automatically increase the number behind it to blufor_1, blufor_2, blufor_3 etc.
Then you just put the prefix to the module and how many markers there are and toggle the sides what use this combatzone.