Army B was a field army of the Confederacy of Independent Systems, first raised by the Trade Federation in 32 BBY. That year, it took part in the invasion of Naboo, in which it was almost destroyed when fighting the Naboo Resistance Army. After the battle, it was stored away on Cato Neimoidia before being reactivated and replenished with new droids to fight as a part of the Separatist Droid Army during the Clone Wars. Army B fought on several fronts, including Mygeeto, Felucia, Antamont, and Geonosis. It was destroyed at Coruscant in 19 BBY.