Grunt Rebellion

The Grunt Rebellion was an event that happened during the long history of the Covenant, and it was basically when Grunts rebelled for better living conditions.

They fought bravely for their freedom and increased respect, and even after they were defeated by the armies of the Covenant and the Arbiter of that time (after their homeworld was almost glassed), they were returned to the ranks of the Covenant as weapon-carrying infantry, since the Elites were so impressed with them. Which was nice really, better than being annihilated.

Some Grunts didn't like this truce, however, and thus the seeds for the creation of the Heretics were sown. The resentment that they passed on to the next generation was then passed on and on until entire legions of Grunts lept at the chance to rebel again when Pretzel King reared his head.