Aleen Aleen was a rocky planet located within the Bright Jewel sector , of the galaxy ' s Mid Rim . It was home to the diminutive , surface - dwelling Aleena species , as well as a bioluminescent tree - like species , the Kindalo . At one point in their history , the two species clashed which almost resulted in the destruction of all sentient life on the planet . During the Clone Wars , the Galactic Republic arrived to help the Aleena rebuild after a series of devastating groundquake s . Description . A world with a desert - like surface , Aleen was unique in that it contained a series of complex caverns in the upper crust that was viewed as a second biosphere with its own unique atmosphere . Formed by the growth of the unique arbozoic tree s , the cave rns were also comprised of tunnels carved by water , lava , and tectonic shearing . Maintaining a unique climate and an atmosphere dangerous to the surface - dwelling Aleena , the planet ' s two sentient species made the conscious decision to recognize the divide between the two environs and remain separated . Aleen ' s surface was dotted with the remnants of Aleena colossi that stood as relics of their ancient society abandoned in favor of a simpler lifestyle . History . Early history . The homeworld of both the Aleena and the Kindalo species , Aleen was a world of two distinct environments 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 in the earliest days of the Galactic Republic , and long before the galactic community had discovered the world . Undergoing an expansionist era , the Aleena settled other worlds and spread out into the greater galaxy , yet many remained on Aleen . Conflict then peace . Some years later , the Aleena came into conflict with the Kindalo that lived beneath the surface of the world , and the two cultures waged a terrible war that caused great damage to both societies through the use of technological weapons . When the casualties grew to such heights as to threaten the existence of life on Aleen , 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 , where the Kindalo resided . While the Great Seal was more symbolic then any actual barrier to the Underworld , as multiple tunnels and caverns were spread throughout the upper crust of the planet , it was a revered site among the Aleena . 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 considerably . Aleena families formed together into kinship clades known as tahiko s . The individual settlements across the planet maintained contact with a planetary government that advised the King of Aleen , a ceremonial role usually held by distinguished priest s . Rediscovery . Over the course of the millennia , Duros spacer s eventually discovered Aleen and 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 . Clone Wars . The Republic saw operations on the world during the Clone Wars , when the Great Seal became dislodged and the two atmospheres began to intermix . As a result , groundquake s began to cause major disruption on the planet , their work was humanitarian in nature . During the relief effort , a mysterious being called Orphne was recorded by Republic agents — particularly the droid s C - 3PO and R2 - D2 — although her nature remained ambiguous . When the Galactic Empire came to power at the end of the war , the Empire established a observation post and listening station on Aleen ' s lone moon , Trohlu .