Bunker

Benefit
The Bunker allows you to garrison your units. When garrisoned, the Bunker will defend a section of your base, represented by a light-blue template visible when built and when selected to move. When another player attacks, troops from that Bunker will counterattack with the militia. This is the only method to add troops other than 1 Militia and 1 Trooper to defending your outpost (Pillboxes, Cannon Towers, etc. will show up but you will still only get default defenses without a Bunker).

The Bunker holds at maximum 10 units. A fair warning - if you desire to sell a Bunker, empty it first or the troops inside might wind up bugged and in limbo. Currently there are attempted fixes in the works, but this simple step will alleviate the risk of running into such a bug.

The mission Stone and Troops - Part 1 requires you to build one Bunker to complete. The bunker will also be useful for The War at Home, which requires you to cover 80% of your buildings with defenses.