Ages of Doubt

The Ages of Doubt was the sixth Age in the Covenant Age system. Ages of Doubt centered around dealing with the fallout of chaotic events in Covenant history.

Overview
During the Progression of the Ages, the Ages of Doubt are represented by a black opal stone. In the ritual, the appropriate dialogue is as followed:

Leader, or Chieftain: Doubt.

Congregation, or Pack: ''Sixth! Faith and patience!''

Eighteenth Age of Doubt

 * During the Eighteenth Age of Doubt, the was introduced into active service with the Covenant fleet.

Twenty-Third Age of Doubt (2462–2525)

 * The was first produced during the Twenty-Third Age of Doubt, with a single ship-of-the-line commissioned - Heaven's Brilliant Bier.
 * The Twenty-Third Age of Doubt followed the Thirty-Ninth Age of Conflict in 2462, in which the Unggoy Rebellion threatened the stability of the Covenant. This age was followed by the Ninth Age of Reclamation in 2525.

Trivia
In Halo Wars, when playing as the Covenant, players can upgrade their Temple by researching the Age of Doubt, improving all Covenant technology by 1. Advancing to the Age of Doubt also gives Covenant players the ability to make s, s, and many other types of units.