This final incarnation of the legendary Tallgeese was created by Treize Khushrenada during the cataclysmic Eve Wars. However, its advanced weaponry took a while to develop, and the Tallgeese III was not ready in time for the war's end. However, the completed Tallgeese III did end up in the care of the new Earth Sphere United Nation's Preventers agency, and it would later be used in combat by Zechs Merquise; former leader of White Fang and now a Preventer agent, code-named "Wind". Zechs would use the Tallgeese III in combat against the rebellious Mariemaia Army, almost single-handedly destroying or holding off many of their new MMS-01 Serpent units.

The Tallgeese III is basically identical to the original Tallgeese, with some modifications to its head and shoulders. For close combat, the Tallgeese III mounted a large shield which contained a retractable heat rod based on that of the Gundam Epyon. The traditional pair of beam sabers remained intact, though the addition of a pair of head-mounted vulcan guns for close-range defense was a minor improvement. The Tallgeese III's primary weapon was its mega cannon whose maximum output rivals that of the Wing Gundam Zero's twin buster rifle, replaced the original Tallgeese's dober gun.

Source: Gundamproject.com, Gundam W: Endless Waltz DVD