Talk:Enemy Units/Pre-1.3/@comment-67.186.172.146-20111220180643/@comment-1489054-20111220183932

Barracks are for training infantry units. They don't defend your base.

Pillboxes have an "area of effect", which appears when you try to move them. They prevent raiders & enemies from attacking the inner area, and participate in combat (controlled by the A.I.) when another human player attacks that same area.

The one-hit kill EVERYTHING units you mention are called Dust Walkers. See the page Enemy Formations for help & pointers on how to fight against them.