The primary military formation of the Imperial Army within the Tapani sector was the 1st Tapani Assault Battlegroup.
Major General Tessala Corvae commanded the 1st Tapani from their base of operations on Tallaan throughout the Galactic Civil War. The unit participated in both the Rout of Spuma and the Humiliation of Barkhesh; however, the latter engagement resulted in substantial casualties, with 20% of the Battlegroup's soldiers lost to acid rain.