Take a look at the photo below. I have a question with regards to both LOS and spotting. So my understanding of LOS is that in the image above, LOS is not blocked as walls don't "block LOS to a hex in which the Wall forms a hexside". That's the part I get. No commentary need on that. The part I don't get (and have not found clarification in the rules) is whether or not the American unit in 15K6 is considered spotted. Yes the American unit is in open ground (so he would be automatically spotted), but a wall in general is blocking terrain and has a +1 Target Modifier. So I would think that the German unit in 15M7 would need to spot the unit first by either making a spotting attempt and rolling a 1 or 2 or the unit would have to wait for the Americans the either move out of that hex or fire. Just because the Americans are behind the wall and have LOS to the Germans doesn't mean they are readily seen. Here is my thought process as why I think the Germans need to spot the Americans. If we look at the image below (same units, just moved over two hexes each), The Germans LOS from 15K7 to the Americans in 15I6 is not blocked from. LOS is clear. However, because the building in 15I6 is considered blocking terrain, the German unit needs to spot the unit in the blocking terrain first or wait for the Americans to move or fire before becoming spotted. The building is considered blocking terrain and has a positive (+4) terrain modifier. I remember reading somewhere that the reason why we need to spot for units in a building is because the units may be "hiding" within it and don't necessarily keep their heads out the window waiting to receive enemy fire. If the case above is true, then why would the Americans in my first example be walking around with their heads over the wall waiting for enemy fire? Wouldn't they be hiding and if they are spotted by the enemy, then they have fire drawn upon them? So based on both my examples above, I believe that in the first example, the German unit would need to spot the American in the clear hex. My thought is mainly due to the fact that even though 15K6 is open hex, the wall give the open hex a +1 terrain modifier and walls in general are considered "Blocking" terrain types. Thoughts?