History
Arcadia was an alternate world under the rule of tyrant Tyrax, who was opposed by Kanan, a native, among other insurgents. Arcadia held a mystical portal which allowed it to access other Earths, which Tyrax used to expand his empire.[1]
In 1993, Tyrax opened his portal to Earth, leading to two CIA agents from Antartica walking into Arcadia and getting imprisoned. This attracted the attention of Earth's Task Force Youngblood, which sent members Brahma, Cougar, Photon, Riptide and Sentinel into Arcadia. Tyrax ordered Youngblood executed, but this was interrupted by the appearance of Kanan and a group of insurgents. Tyrax escaped his throne room, promising to kill Kanan on their next encounter, and closed the mystical portal remotely, but Kanan helped Youngblood and the CIA agents reach Earth before it closed.[1]