The B2-series super battle droid or B2 super battle droid (SBD) was an upgraded version of the B1-Series battle droid, with superior armament and armor. They were manufactured after the Invasion of Naboo proved the need for stronger droids. B2s were used by the Trade Federation, the Techno Union, and later, on a much larger scale, the Confederacy of Independent Systems. Some units were later reactivated on Mustafar by Gizor Dellso and other members of the Separatist holdouts, and the Galactic Al