From Fantasy Flight Games Website

The Union Troop Pack for Tannhäuser comes with two additional Commando Alpha and Commando Delta figures. These figures feature an alternate color scheme making it easy for players to differentiate their new troops from the ones in the core game.

These Troop Packs give players new options when constructing their forces, and provide an all new pack for their Troops! Each pack also features brand new background information, a unique scenario, and all new tokens for the new Troopers as well as the ones found in the core set.

This is not a stand-alone game. A copy of Tannhäuser is required to play.