Ages of Doubt

The Ages of Doubt are eras in Covenant history following the Age of Conversion, where the effects of the previous eras are dealt with.

The last Age of Doubt, the 29th, ended in 2525, just months before the discovery of Humanity. This also marked the beginning of the 9th Age of Reclamation.

The Ages of Doubt are represented by the opal stone.

Trivia

 * These Ages are considered as the shortest periods of Covenant history. It was not until after the latest of these Ages that the Human-Covenant War started.
 * Ages Of Doubt appear to be caused by a time of trouble for example the Unggoy Rebellion.
 * In Halo Wars, when playing as the Covenant, players can upgrade their army by researching the Age of Doubt, improving all Covenant technology. Advancing to the Age of Doubt also gives Covenant players the ability to make make Locusts, Vampires, and many other types of units.