Sangheili (Earth-2042)

"On the blood of our fathers, on the blood of our sons, we swore to uphold the Covenant!"

- Rtas 'Vadum before the raid on the Threshold gas mine.

The Sangheili are a saurian sentient species known for their warrior culture and combat skill. Named after their homeworld, Sanghelios, they have historically been known in the galaxy for their former role in the Covenant's military hierarchy. Originally one of the Covenant's two founding species, the Sangheili formed the hegemony's military backbone until just before the end of its existence. They had a very strong rivalry with the Jiralhanae, which finally led to open conflict during the Great Schism at the conclusion of the Clone Wars.

Source

 * https://www.halopedia.org/Sangheili