Aleen / Legends Aleen was a planet located in the Mid Rim that contained two unique environs : the surface world inhabited by the Aleena and the Underworld , the domain of the Kindalo . Description . A desert world on the surface , Aleen ' s upper crust contained a second major environ that contained a series of complex caverns with its own unique atmosphere . Formed by the growth of the unique arbozoic trees , the caverns were also comprised of tunnels carved by water , lava , and tectonic sheering . Maintaining a unique climate and an atmosphere dangerous to the surface - dwelling Aleena , the Underworld was inhabited by the tree - like Kindalo and the mystical being , Orphne . Just as the Aleena could not breathe in the Underworld environment , Kindalo were harmed by the unfiltered oxygen of the surface world . To this end , the planet ' s two sentient species made the conscious decision to recognize the divide between the two environs and remained separated . Aleena colossi dotted the surface of the planet , standing as relics of their ancient society abandoned in favor of a simpler lifestyle . History . The homeworld of both the Aleena and the Kindalo species , Aleen was a world of two distinct environs that had a shared , yet separate history . Establishing a strong culture and a fierce army , the Aleena built towering monoliths that were vital to the religious orders that formed on the planet . The Infinite Empire controlled the planet at its height , and the Aleena and the Kindalo served as client species the reigning Rakata . After the Infinite Empire collapsed , the Aleena experienced an expansionist era , during which they settled other worlds and spread out into the greater galaxy . Aleen Minor became a major colony of the Aleena species , and would go on to become the center of Aleena culture in the distant future . The Aleena came into conflict with the Kindalo that lived beneath the surface of the world , and the two cultures waged a terrible civil war that caused great damage to both societies through the use of technological weapons . When life on Aleen was nearly destroyed by the fighting , a compact was formed that secured the notion that neither society would interfere with the other again . To this end , the Great Seal was forged to serve as a reminder of the compact , and was placed within a primary tunnel opening that allowed access to the Underworld . Vowing to leave behind the society that caused the near apocalypse on Aleen , the Aleena entered into an era of self - imposed seclusion and scaled back development considerable . Forming into kinship clades known as tahikos , the individual settlements maintained contact with a planetary government that advised the King of Aleen . Over the course of the millennia , Duros spacers discovered Aleen and eventually introduced the Jedi Order to the world . Establishing a chapter house over top of the Great Seal , the Jedi protected the world for a time , before abandoning their chapter house and allowing it to fall into disrepair . Around 21 BBY during the Clone Wars , the planet began suffering from groundquakes caused by the Kindalo because the Great Seal had been opened under mysterious circumstances . The Kindalo thought the Aleena were responsible , and so caused massive groundquakes in retaliation , prompting the Republic to send a squad of clones led by Wolffe , also accompanied by C - 3PO and R2 - D2 for translation , to undergo a relief mission . There , the droids discovered the Underworld and were able to seal the breach and restore balance to Aleen . Although the clones were skeptical , the Aleena were overjoyed . When the Galactic Empire came to power at the end of the war , the Empire established a observation post on the moon of Trohlu . Behind the scenes . Due to the discrepancies between the previous sources and the planet described in " " TV series , Jason Fry stated that those Aleen are two different worlds . The old Aleen is now Aleen Minor and the new is Aleen . This was later formalized in .