The Thistle is a light anti-air missile tower that can shoot down light aircraft.

Build some early on to protect your base from early air raids.

Its low rate of fire makes it vulnerable to swarms when unassisted. It can fire much further than it can see on its own, so always have radar to spot for them.

Thistles can be picked up and carried by any Heavy-capable transport unit, such as the Skyhook.