to create a truck:
mytruck = "Truck5t" createVehicle getMarkerPos "mytruckpos"
then create the 12 man squad:
"OfficerW" createUnit [getMarkerPos "barracks_pos",groupAlpha,"officer_one = this; groupAlpha = group this",0.4,"SERGEANT"]
then to make the rest of the units, change the "SoldierWB" in the following:
"SoldierWB" createUnit [getMarkerPos "barracks_pos",groupAlpha,"w1=this",0.35,"CORPORAL"]
to others such as "SoldierWMG", etc.
then to move them into the truck:
{_x moveInCargo myTruck} forEach units officer_one
and finally to move it:
mytruck doMove getMarkerPos "move_pos"