The BL-series Battle Legionnaires were a series of battle droids produced by the Separatist 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.
Designed in part by the MandaloriansoldierFenn Shysa, the Battle Legionnaire droids were bequeathed to the Mandalorian Protectors Confederacy following Mandalore's alliance with the Separatists. The war droids bolstered the Protector's numbers, and acted as front-line troops during battle, assaulting the enemy's forward ranks while the Protectors jetpacked in and struck behind the opponent's lines. The Mandalorian Protectors equipped their Legionnaire droids with ancient battle harnesses, and the droids saw some of the heaviest fighting during the Protectors' campaigns at Kamino and New Bornalex, only to be nearly wiped out at Norval II with the rest of the Protectors. Some survived, however, and during the early years of the Galactic Empire's reign, one droid was owned by the renown bounty hunterBoba Fett.
The Battle Legionnaire droids were primarily adorned with a drab greencolor scheme—matching the color of the Mandalorian armor common among the Mandaloriansoldiers with which the Legionnaires fought—though portions of their plating were blue, and marked with gold-colored trim. Their two photoreceptors were typically lit with a gold color, as well. BL-series droids had military-grade balance gyros, and their many joints had been calibrated to allow for maximum torque. As a result, Battle Legionnaire droids could lift thousands of kilograms above their heads, and run at speeds approaching thirty kilometers per hour for more than a day without the need for a recharge. The droids were equipped with signal jammers, and carried an internal first-aid kit within their armored bodies for treating their organic comrades.[2]
Battle Legionnaire's were capable of wielding hand-held blasters in combat,[3] though they were most often outfitted with deadly[4]Briletto-made AAP-11 blaster boxes that were strapped to their chests. A number of specialized BL-series droids were armed with ancient Mandalorian battle harnesses, large weapon platforms mounted on twin tanktreads and equipped with laser cannons, a heavy blaster cannon, a giant claw arm, and a sonic-pulverizing trip hammer.[2]
Remembering the role the Mandallian Giants played in Mandalorian forces during the New Sith Wars, Spar commissioned a battalion of droids from their new Separatist allies,[2] awarded with a run of one-thousand BL-series Battle Legionnaire droids, bolstering the Protectors' meager numbers.[4] Designed in part by the Mandalorian Protector Fenn Shysa,[1] who was inspired by a run-in he had with the assassin droidC-3PX,[2] the BL-series was manufactured in the Separatist droid foundries[4] of the Techno Union-owned company, Baktoid Combat Automata. Though the Mandalorians were traditionally ambivalent toward the use of droids,[2] preferring the benefits of their own hard work,[9] the Battle Legionnaire droids were afforded a level of respect similar to the Basilisk war droids used by the ancient Mandalorian Crusaders. During the Mandalorian Protectors' engagements, the Battle Legionnaires saw some of the heaviest fighting;[2] Spar would often use the BL-series droids as heavy front-line units, attacking the enemies forward ranks while the Protectors themselves would jetpack in behind their opponents' defenses and strike with the element of surprise.[1] Several Battle Legionnaire droids were also equipped with Mandalorian battle harnesses, using the deadly weapons platforms to deal out more devastating damage.[2] Because of their effectiveness, the Mandalorian Protectors and their Battle Legionnaire droids became highly sought-after Separatist units, with a reputation for taking down a target in a day that the Confederacy's droid army couldn't in a month.[1]
The BL-series droids took part in the Mandalorian Protectors' strike against the planet Kamino[2] and the Republic cloning facilities located there, as part of a series of blitzkrieg assaults in retaliation for the death of a prominent Confederacy leader.[4] Prior to the assault on New Bornalex, the Protectors toasted their Battle Legionnaire droids,[2] and though the battle was a victory for the Protectors,[4] their army of BL-series droids suffered significant casualties.[2] On Norval II, during an attempt to capture the Republic senatorPadmé Amidala, the Mandalorian Protectors were led into a trap and ambushed by the Republic's clone army.[4] The vast majority of the Mandalorian Protectors were killed in the ensuing conflict, and all but a few Battle Legionnaire droids shared their fate.[2]
One of the few Legionnaire droids to survive, BL-17, was acquired by the bounty hunterBoba Fett, and was put to work as the[2] culturally estranged Mandalorian's[10] aide during the early days of the Galactic Empire's reign.[2] However, BL-17 came to an end on the planet Boonta[5] in 15 BBY,[11] following a skirmish with the droids C-3PO and Proto One.[5] In the years after the Battle of Endor, rumors floated about of a belligerent 88-series droid that possessed the head from a BL-series droid.[6]