Rebels in opposition to the Empire's heavily armed forces.
A heavy battalion was a unit type within the Galactic Empire's Imperial Army, consisting of various armored vehicles. During the Battle of Atollon, Grand Admiral Thrawn's armored division dispatched multiple heavy battalions to the surface of Atollon. These battalions then engaged the Phoenix Cell of the Rebel Alliance, employing their All Terrain Armored Transports and armored cavalry.