Trenches provide their cover benefit of 50% only when the pawn stands within the them... meaning the pawn standing on top of a trench tile acquires 50% cover.

I believe the best strategy to maximize cover is to use the "...-wall1-wall2-barricade/sandbag-wall1-wall2-..." layout, where you place your pawns behind the walls 1 and 2. Your pawn shoots from around the corner of the wall and gets 75% cover vs. enemies straight ahead, but also gets additional cover from the barricade/sandbag vs. enemies attacking from an angle. Now make the tiles behind this cover line full of trenches, so that your pawn is not only hidden behind the cover, but also "stands" in additional cover of 50%.

An enemy shooting straight ahead, which could have a chance of hitting 50% (effected by skill, health, weapon, range) gets lowered to 12.5% coz of the wall and additionally then to 6.25%, when also standing in a trench.

引用自 zimeth：

Trenches provide their cover benefit of 50% only when the pawn stands within the them... meaning the pawn standing on top of a trench tile acquires 50% cover.

I believe the best strategy to maximize cover is to use the "...-wall1-wall2-barricade/sandbag-wall1-wall2-..." layout, where you place your pawns behind the walls 1 and 2. Your pawn shoots from around the corner of the wall and gets 75% cover vs. enemies straight ahead, but also gets additional cover from the barricade/sandbag vs. enemies attacking from an angle. Now make the tiles behind this cover line full of trenches, so that your pawn is not only hidden behind the cover, but also "stands" in additional cover of 50%.

An enemy shooting straight ahead, which could have a chance of hitting 50% (effected by skill, health, weapon, range) gets lowered to 12.5% coz of the wall and additionally then to 6.25%, when also standing in a trench.

WOW So much details
But somehow I can order my pawn to stand on top of a trench. How weird