Quote Originally Posted by Hooahguy View Post
So I just had a large assault where some of them walked through my trap area, and some blasted through the wall with grenades. Thankfully I was more than prepared and they were defeated quickly, but it showed me that enemies arent going to automatically use the trap area.
those would be sappers - and yes they will beeline to your colony going through walls or mountains - they default back to normal AI once all the grenade armed raiders are dead so a mortar attack or a well place sniper is the best defence against them.