Rise of the Covenant

2200 BCE - San 'Shyuum Civil War: Stoics believe the technology of the Forerunners is sacred but Reformers believe in utilizing it to achieve godhood for themselves

2100 BCE - Civil War Ends: The Stoics win the Civil War, so 1000 Reformers steal the Dreadnought.

938 BCE - San 'Shyuum-Sangheili War: Second conflict over whether Forerunner technology should be studied or revered.

876 BCE - The Sangheili resistance falters

852 BCE - The Writ of Union, unites the San 'Shyuum & Sangheili into the Covenant.

784 BCE - Covenant Expansion: The Lekgolo join the alliance.

648 BCE - Stellar collapse destroys the San 'Shyuum homeworld. High Charity becomes the new Covenant Capital.

1112 CE - Covenant Expansion: The Yanme'e join the alliance.

1342 CE - Covenant Expansion: The Kig-Yar join the alliance.

1552 CE - Technology is researched to increase the lifespan of the San 'Shyuum.

2524 CE - First Contact: Humans and the Covenant first encounter each other in space near Harvest.

2525 CE - Covenant Expansion: The Jiralhanae join the alliance.

February 11: The First diplomatic contact between Humans and the Covenant ends in bloodshed on Harvest.

February 23: Harvest is evacuated when a Covenant attack results in 23,000 Human casualties.

2530 CE - The Covenant destroy UNSC colony Eridanus.

2535 CE - The Covenant have destroyed nearly all Outer Colony worlds

2542 CE - Emerald Cove abondoned by the UNSC.

2549 CE - The Covenant attack Paris-IV.

2552 CE - August 30: The Fall of Reach

September 19: The battle of Installation 04 begins.

October 20: The first battle of Earth.

October 21: The battle of Installation 05 begins.

Fall of a Prophet: The Death of the High Prophet of Regret and the rise of the Jiralhanae.

Betrayal: The Sangheili discover a long hidden truth, causing the start of the Covenant Civil War.

November 4: The second battle of Earth and the battle of Installation 00 (The Ark).

2553 CE - The Human-Covenant War ends