A timeline of all major events in the Halo universe from the time of the Forerunners through the rule of the Created.
At the start of the Covenant in 851 BCE, a group of Sangheili who did not agree with the peace being formed with the San'Shyuum, formed around their leader Ussa 'Xellus and escaped to a previously unknown Forerunner construct known as Shield World 0673.
938 BCE - 852 BCE
The War of Beginnings was an eighty-six year conflict between the San’Shyuum Reformists who escaped Janjur Qom after the War of Wills and the Sangheili species between 938 and 852 BCE.
860 BCE
The Skirmish of the Planet of Blue and Red was a conflict between the San’Shyuum and Sangheili during the War of Beginnings in 860 BCE.
852 BCE
The Writ of Union was a declaration of peace between the San’Shyuum and the Sangheili, as well as the formation of the Covenant, signed by both species in 852 BCE.
852 BCE - 791 BCE
The Writ of Union not only formed an alliance between the Sangheili and the San’Shyuum, but also commissioned the construction of a great holy city of the Covenant, known as High Charity.
850 BCE
Following the end of the War of Beginnings, the San’Shyuum undertook an effort to recover additional females for breeding purposes from their homeworld, known as the Mission to Janjur Qom.
850 BCE
The Rending was a planned disassembly of Shield World 0673, also known as the Refuge, by a group rebelling against the formation of the Covenant in 850 BCE.
