The Mystery of Lacroa Part 1: Arrival
A slip-up with Bell Wood's Dimensional Transport Device sends the Gundam Force to the ruined kingdom of Lacroa, Zero's homeland. there, they meet three triplets who survived the Dark Axis invasion, and Talgeese, Knight of the Tempest, a warrior who joined the Dark Axis!
Aired 17/03/2004EP 11 - The Mystery of Lacroa Part 1: Arrival
2004
SD Gundam Force
The land of Neotopia is attacked by the Dark Axis, evil invaders from another dimension who wish to conquer this land. Neotopia's answer: the secret Super Dimensional Guard and their defenders, the Gundam Force. Led by Captain Gundam, the Gundam Force and its team of Gundams with special abilities are aided by a boy named Shute as they stop at nothing to defend the land from the Dark Axis and to defeat them once and for all.
(Source: Anime News Network)