Doisac

Doisac is the name of the Jiralhanae homeworld. It possesses three natural satellites, named Warial, Solrapt, and Teash, and is the third planet of the Oth Sonin system.

History
Doisac was visited by the Forerunners, towards the end of the Forerunner-Flood war. The Jiralhanae were one of many sentient species indexed by the Librarian for preservation aboard Installation 00. After the Halo Array was fired, the Jiralhanae were returned to Doisac to begin re-building their culture.

Doisac is a very war-torn land due to constant Jiralhanae civil warfare, typically between clans. Despite their savagery, Jiralhanae proved intelligent enough to achieve spaceflight and space-faring status. However, their warlike nature inevitably led them into conflict, and eventually the various Jiralhanae master-packs fell into a massive war, which the Jiralhanae themselves sometimes refer to as the "great civil war". This war caused the collapse of Jiralhanae society; by the time the Covenant discovered them in 2492, the species had just rediscovered radio and rocketry. In their primitive state, they were quickly defeated and absorbed into the Covenant.

After their induction to the Covenant, many Jiralhanae left Doisac to settle on Covenant colonies or live on High Charity. During the final months of the Human-Covenant War, it is more than likely that Doisac was a spot for battles between the Covenant and Thel 'Vadam's separatists. Although most Jiralhanae returned to Doisac, after the war, some were allowed to live on Sangheili worlds as laborers. Additionally, due to the Jiralhanae's lack of advanced technology, they were unable to attain resources or even food for themselves on Doisac, instead resorting to raids on Sangheili settlements.

Topography
Doisac is a tropical world, where volcanic activity is common. At least half of Doisac's surface is covered in rain forests, while the other half is largely composed of molten rock, lava, and large volcanoes. Doisac has a very harsh environment, yet it is still preferred by many Jiralhanae. The rocky and forested planet also contains large amounts of deserts, and a few seas of water.

Its environment is very Earth-like, with forests and oceans. It has been noted, however, that its terrain is dominated by magma and magnetism, hinting at high tectonic activity and rich magnetized iron deposits. It is possible that Doisac is closer to Oth Sonin than Earth is to Sol because its surface temperature/climate is slightly more tropical, ranging from -15 °C to 52 °C (5°F to 125.6°F). Alternatively, its atmosphere may cause a natural greenhouse effect, trapping heat and warming up the planet in a similar fashion to Venus.

The planet is orbited by three moons; Solrapt, Warial, and Teash. The latter two have some form of Jiralhanae settlements on them.

Trivia
The environments and structures of Doisac that are depicted in Halo Legends appear almost identical to the planet Kashyyyk from the Star Wars franchise.

List of appearances

 * Halo 3
 * Bestiarum
 * Halo Legends
 * Origins
 * Halo: Evolutions - Essential Tales of the Halo Universe
 * Stomping on the Heels of a Fuss
 * Halo: Escalation