Alliance Barracks
The Alliance Barracks train Infantry Platoons and PLEX Soldiers.

Alliance Light Vehicle Factory
The T2-B and Assault Speeder are both produced through this Structure

Alliance Heavy Vehicle Factory
These manufacture T4-B tanks and MPTL-2a Artillery 

Alliance Command Center
This Building acts as as base of operations on Rebel outposts, in skirmish battles it can be used to recruit heroes and develop new technologies.

Ion Cannon
An energy weapon built on the surface of a planet that the Rebels can fire during a space battle to disable an enemy ship.  Though it fires into space, the Ion Cannon itself is on the planet's surface and can only be destroyed during a land tactical battle.