ooh ok, very cool

Do not misunderstand. There's one mod that allows you to put trenches like in Napoleon and do square formations. In this picture, I put trenches as if they were a building, by using a mod that has some more buildings. I don't remember ho it's called but I invite you to check on my page, and check my latest Steam workshop map I uploaded. There you'll find the required mod, because in some of my maps, I add those buildings

whats the mod for the trenches

one mod does!!! This map of mine (which soon will be released), will have trenches and you MUST have this mod activated in order to see those buildings ;)
No worries, when I post the map I'll tell people know what will be needed (I might even make a video with comments hehehe)

Wait, fall of the samurai has entrenchments?