OK, since everybody seems to be getting confused let's start again.
Create a west loon (=AI soldier=moron=dude=guy), rank corporal.
Next to him, create a civilian. Make him a private, the player unit, and give him some ammo and a weapon.
Note that the civvy will start in formation with the west loon, unless you have selected none in his special box. If you do that, he will start out of formation.
Test the mission. Make sure the west loon is the group leader.
Now add an east loon or two, quite close and facing you.
Test.
Now write
deletevehicle this in the init field of your west corporal
Test. Don't fire. You will get shot.
Try it out and see what happens. If it doesn't work, play with it a bit. If all else fails, post here again and tell us what's going wrong and we'll fix it.