The original sixth army was famed for its Sentinels, whose battlecry is "Pride of the Sixth!". It was destroyed by the tactical prowess of Lowre Darien during the Twelve Year War against the Commonweal, some details of which are shown in the short story Ironclads.
Reformed around a core of heavy Szaren bee-kinden infantry, with a new general, it was sent to support the Seventh Army in the march on Sarn. "The Hive", as it was now called, was unfortunately again outmaneouvered by a Dragonfly general: this time Salme Dien and his Landsarmy. With its general dead, the surviving troops were folded into the Seventh.