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{{Spoiler|source=The First Wall (Novel)}}Haling from the [[Afrik]] [[Addaba Hive]], it was composed of several depleted [[Regiment]]s sent by the [[Hive]] to defend the [[Imperial Palace]]. However they came under repeated attacks, from the forces of [[Horus]] on their journey and lost or were separated from their Commanders. This made it necessary for the Regiments to be reorganized into the Free Corps{{Fn|1a}}. After much strife, the new Regiment was eventually able to reach their rendezvous within a hidden base, near the [[Lion's Gate]] space port. The [[Primarch]] [[Dorn]] had meant for the Imperial forces there to serve as reinforcements for the space port, when it became threatened. However when he later gave the order for them to attack Horus' forces invading the Lion's Gate, the Addaba Free Corps revealed they were loyal to the traitorous [[Warmaster]]{{Fn|1b}}. The Regiment then began attacking the other Imperial forces in the hidden base, which prevented them from aiding the space port{{Fn|1c}}. Because of the Addaba Free Corps' actions, the Lion's Gate fell to the Warmaster, but in retaliation, the Imperium soon destroyed the Regiment's home, [[Addaba Hive]], with orbital fire.{{Fn|1d}}

*1: [[The First Wall (Novel)]], Chapter 16