2142 CE

In 2142 CE, the Unggoy were discovered on their homeworld of Balaho by the Covenant and forcibly added to their list of member species.

2462 CE

Following years of abuse of Unggoy at the hands of the Kig-Yar culminating in the sterilization of thousands via poisoning, the Unggoy Rebellion began in 2462 to protest their treatment by the Kig-Yar and the Covenant as a whole.