The First Wave
Over 350 years ago, the first wave of inhabitants arrived on Raana through the Celassi Stargate on the colony spaceship USS Seneca. It was a hand-picked group of 366 young people, entrusted with establishing an outpost capable of accommodating bigger groups over the next decade. Regrettably, the first wave crashed their ship close to the Beryll mountain range, not far from where Ikaanos City now resides.
Unbeknownst to the International Space Agency back on Earth, the majority of colonists survived the crash. However, communication with Earth was now impossible owing to the destroyed ship's primary, secondary, and backup deep space transmitters being irreparably damaged.
After a century of living in the vast wilderness of Raana, just a few earthly traditions remained among the First Wavers, who had established a tribal society more akin to a medieval world with swords and wooden carts than to their founding fathers' high-tech civilization.
When The Second Wave finally arrived from the skies nearly a century after the first wave crashed on Raana, many of the First Waver descendants refused to accept the new overlords and preferred to continue their medieval style of society, viewing the newcomers as a threat similar to what they'd been fighting in the jungles for as long as they could remember.
Those first wavers who maintained their distinctive culture rather than integrating with the more numerous new arrivals came to be known as "tribalists".
After The Severance, the First Wavers' well-established farmlands became popular to pillage or annex, a tradition that's continued ever since. Today, Ikaanos places a premium on crafts and other cultural artifacts, and tribal women are in high demand as sex slaves because to their petite stature and strengthened resilience.