I've spent a couple of hours now trying to follow the tutorial for the third scenario in the first tutorial campaign. I move my mortar, machine gun, and HQ up to the Base of Fire objective and deploy. My problem is that I can't get LOS to anything on Hill 2014 from this base of fire. I might get lucky and one of the other squads will get LOS to a unit on the hill, but I'll move my HQ and MG all over the place and just cannot get LOS. I've been shuffling these units around the hill that my base of fire is on, but I just can't get a target. This is frustrating.
Also, do I need the HQ to spot for my mortar if I can get LOS for the mortar team?