history of elites

Development of Civilization and the Covenant
The Sangheili home world, Sanghelios, had at one point been visited by or had been in contact with the Forerunners. They revered the objects these "gods" had left, and considered tampering with them a heresy beyond any other. In 938 B.C.E. they encountered the San 'Shyuum (who would later be known as "Prophets" by Humans), a race who also worshipped the Forerunners as Gods, but had utilized Forerunner technology for their own needs, believing the technology had been left behind by the Gods as gifts for their children. This sparked a war between the two races over how to treat the relics. Even though the Sangheili had a large numerical advantage and much stronger ships and soldiers in general, they suffered extreme casualties under the sheer power of the Prophets' Dreadnought, a surviving Keyship, and by 876 B.C.E. even the most devout had to admit their survival depended on the reconstitution of their own Forerunner technology. This, of course, led both sides to an agreement that ended with the decommissioning of the Forerunner Dreadnought and a shaky alliance that eventually expanded into the Covenant.

The Prophets helped assuage the Sangheili by informing them of the Great Journey: By seeking out the Holy Rings scattered throughout the galaxy and utilizing them, a Great Journey would begin. This Great Journey would transform believers into godlike beings, while providing salvation for their doomed existence of fighting with the Flood. The Sangheili then became the bodyguards of the physically less imposing Prophets, who would search the galaxy for the Halos. The Writ of Union was drawn up in 852 B.C.E. in order to codify the Covenant. Its first canto clearly outlines the nature of the Covenant from the perspective of the Prophets.

Being one of the few races in the Covenant to achieve space-faring status without outside intervention, Sangheili interaction with the San 'Shyuum was initially strained due to memories of the recent war. However, the two sides later formed a prosperous relationship, eventually laying the foundation for the modern Covenant hegemony.

During their membership in the Covenant, the Sangheili were simply put, technological and societal equals of the San 'Shyuum. However, for a significant period, they found themselves as the dominant military muscle for the entire Covenant structure - hardly surprising given the warlike, feudal nature of their homeworld, Sanghelios. What was surprising was the cyclical stability this feudal society was able to offer. Technological and medical advancement prospered, and the intelligent, aggressive Sangheili were peerless until they encountered the San 'Shyuum. With exchange of goods and ideas, the Sangheili adapted to and eventually embraced the Covenant religion, grafting its tenets to their own belief system.

Description
Sangheili are at least 2.24 meters tall including helmet and armor, have two fingers and two thumbs on each hand which are much larger than human fingers and thumbs, which make the Sangheili look ungainly when wielding small human weapons such as the pistol. They look vaguely like lizards or theropods, except for their jaws. When wearing armor, they take on a shark-like look because of the "fins" on the sides of their helmets. Their jaws are made up of four separate mandibles attached to their face, a more insect-like trait. The Sangheili are attributed for great strength and intelligence, and are praised for their bravery and honor. Sangheili warriors augment these natural abilities further through use of Energy Shields integrated into their armor. Depending upon rank and mission objective, they are commonly seen in battle with Plasma Rifles, Covenant Carbines, Needlers and sometimes, if they are higher ranked, Energy swords. Sangheili employ coffin-like Orbital Insertion Pods as well as Phantom and Spirit Dropships for military transit purposes and rapid-response operations. Historically, Sangheili have followed the Covenant mentality of maintaining hatred towards Humanity, believing them to be an affront to their religion and a challenge towards the Great Journey. However there are signs that this stance is being slowly abandoned as seen in the tentative alliance between the two enemies, forming the core allied faction at the end of Halo 2 and during Halo 3.

In Halo: Combat Evolved, upper ranks have a Forerunner symbol adorning their back. It is not known if the symbol varies from rank to rank. In Halo 3, Sangheili have Forerunner symbols on their arms and on the sides of their torso.

Anatomy and Physiology
Sangheili are muscular and at least a foot taller than a SPARTAN-II. Their jaws are quadruple-hinged, with an upper jaw and four mandible-like lips. With few exceptions, these mandibles are generally shown with six teeth each; many sources also depict an additional large fang on the tips of each mandible. Anywhere from eight to ten broader teeth have been observed mounted on the central jaw structure. In Halo Wars and Halo: Reach, the Sangheili are depicted with more numerous, more feral-looking teeth. In the Halo Legends short The Duel, the Sangheili Han, Fal 'Chavamee, and Roe, keep their mandibles closed, using only the front two joints of their lower mandibles to speak, giving them a more humanoid appearance. While it may not actually be canon to the Halo franchise, it is possible that the Sangheili don't usually use all four of their mandibles, except when breathing heavily; an example would be during combat situations, though this has yet to be confirmed. Sangheili smell with the use of two nostrils, each a little in front and below the eye socket. Given their predatory nature, a Sangheili's sense of smell is likely very developed. Their hands are tetradactyl, having four digits; two middle fingers, and two opposing thumbs on the outside for grasping. Their legs are digitigrade, with short upper and lower legs, and elongated tarsals, using the distal and intermediate phalanges to support their weight when walking. This arrangement possibly allows them to run very quickly and jump large distances, compared to ordinary humans and other Covenant races. Their superior agility may also be attributed to their homeworld's higher gravity; the additional strength required to move normally in a high-gravity environment would likely cause them to be more powerful in lower gravity situations. They also appear to have a double set of pectoral muscles, which contribute to their incredible strength.

Sangheili have at least two hearts , which circulate indigo-colored blood through their veins; the coloration is most likely caused by bimetallic hemoglobin, possibly cobalt-iron, whereas the crimson-blooded Humans possess monometallic iron-based hemoglobin. Though there are many theories on the subject, the chemical formula(e) of Sangheili hemoglobin is still unknown. It is assumed that they breathe oxygen, as they can breathe the same atmosphere as Humans without any trouble, and their homeworld has a nitrogen-oxygen atmosphere, similar to Earth's.

Male Sangheili have grayish-brown skin, which in Halo 2 looks spotted or scaly, and the majority of Sangheili have either dark blue, black, or brown eyes, although there are a few exceptions. It has been theorized that the reason Sangheili seem to have dark, blue eyes is because they wear eye coverings (which provide their in-game HUD). This hypothesis comes largely from the Arbiter's appearance - when standing before the High Council in his armor, his eyes were dark, but after his armor was removed, his eyes became a much lighter brown -- and is also supported by the fact that in Halo: Combat Evolved, a Sangheili's eye color is always the same color as their armor. Sangheili have laterally-positioned eyes with slit-shaped pupils, large irises, and horizontal eyelids, though these traits can only be seen in Halo 3 - Sangheili in Halo 2 have all black eyes with no pupils except for the Arbiter, and in Halo: Combat Evolved they never blink.