The BL-series Battle Legionnaires were a series of battle droids produced by the Confederacy of Independent Systems for the Mandalorian Protectors during the Clone Wars. Though they were manufactured in a limited, one thousand-unit run only, Battle Legionnaire droids were powerful and lethal in combat. Visually similar in design to Cybot Galactica's 3PO-series, their deceptively strong metallic bodies were armed with AAP-11 blaster boxes and decorated in the same green livery that was commonly seen on the armor of the Mandalorian Protectors.