Ages of Conversion (Earth-2042)

"Thus was the Age of Reconciliation the true seed of the Age of Conversion. The new Age was vested in the adaptation of all other sentient species that came to our attention, a conversion that came about through the domination of revelation itself and, when necessary, conquest."

- A San'Shyuum scribe, in the Record of Punished Deeds

The Ages of Conversion were time periods in Covenant history when the hegemony incorporated other species  into itself, either through conquest or religious conversion. There were a total of five Ages of Conversion, as members of the Covenant fringe did not merit enough recognition to be warrant an age being identified each time a new member was included. In the Covenant's cyclical perspective of the ages, the Age of Conversion was considered the fifth age. During the Progression of the Ages, it was represented by coaxium.

Source

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