- Main article: Outer Colony Massacres
Prior to Covenant attacking the Inner colonies, the Covenant had laid siege to the Outer Colonies for about a decade. Planets like Harvest and Arcadia had been attacked, killing millions in the process. The UNSC had stripped away most of the Colonial Military Administration, becoming humanity's main military force.
In 2530, following the Battle of the Great Bear, Admiral Preston Cole would devise the basis of the UNSC Emergency Priority Order 09881A-1 or the "Cole Protocol". This order was devised to help make sure the Covenant would not find the inner colonies, and was mostly the reason why it took so long.
Numerous ships were pulled from their positions in the Outer Colonies to defend the Inner Colonies. Old ships, such as the Halcyon-class light cruiser UNSC Pillar of Autumn, were refitted and brought back into service to supplement the remaining defense forces.
One of the earliest battles in the Inner colonies was the Battle of Camber. 5.5 million people were killed in the battle, and the planet was glassed. Nearly a decade later, Miridem would come under attack leading to the capture of Dr. Catherine Halsey. Actium would fall with Skopje at about the same time. The Covenant had also started infesting the space between the Luyten 726-8 system and the Sol system. In a rare moment, the colony of Ballast would come under attack and the UNSC would win the battle.
The Fall of Reach
- Main article: Fall of Reach
- “We knew this day would come. They have found our fortress among the stars.”— Catherine Halsey
The Fall of Reach was one of the greatest defeats in the Human-Covenant war.
In 2552, the Covenant had discovered Reach. The Covenant initially landed on the planet with a smaller fleet, but it began to escalate as more and more combatants arrived on either side. Dozens of Inner Colony planets were bypassed by the Covenant Fleet attacking Reach. While Reach would end up being destroyed, a cruiser, the UNSC Pillar of Autumn, would escape the destruction and begin the decisive Battle of Installation 04.
It can be presumed that even more inner Colonies survived, considering the next Covenant attack was Earth.
Operation: FIRST STRIKE
- Main article: Operation: FIRST STRIKE
The Covenant had discovered Earth, and began preparing their forces in the nearby system of Tau Ceti. The Prophet of Truth had put together forces mostly comprised of Jiralhanae. These forces would be destroyed, sparing Earth of a large invasion.
The Battle of Earth
- Main article: Battle of Earth
- “Earth...is all we have left.”
After almost 27 years of war and the effort of most of humanity, Earth finally came under attack by the Prophet of Regret in late 2552. Earth's orbit would become the first area to be besieged, before the Prophet would move onto New Mombasa. The Prophet would then use slipspace to fast travel out of New Mombasa and to Installation 05. Other Covenant forces would eventually move onto Ross Island, Havana, Cleveland, and Pawa. When the Keyship carrying the Prophet of Truth and John-117 returned to Earth, his forces would use the crater created by Regret to dig up The Artifact. This artifact would eventually lead to Installation 00 and the end of the war.
The loss of many of the inner colonies had a severe impact on the remaining UEG. The loss of Tribute alone would have a severe economic impact on human space. On top of this, the Inner colonies that were hit hard by glassing would take some time to come back up to full health. Reach wouldn't become habitable until 2589.
List of Engagements
- Battle of Actium
- Battle of Ballast
- Battle of Camber
- Battle of Chi Rho
- Battle of Earth
- Battle of Mare Erythraeum
- Battle of Miridem
- Battle of October 10
- Battle of Skopje
- Battle of Tribute
- Fall of Reach
- Operation: FIRST STRIKE
- The Inner Colonies are entered by the Covenant.
- The Battle of Actium ends.
- The Covenant Empire take down a communication relay on Reach, beginning the Fall of Reach.
- Tribute is also attacked at the same time.
- Operation: FIRST STRIKE takes place in the Tau Ceti system. The Unyielding Hierophant is destroyed.
- The Battle of October 10 takes place.
- The Battle of Earth begins. Mombasa is the first place on Earth attacked.
- The Battle of Mare Erythraeum begins on Mars.
- The Battle of Earth ends.
- Camber is attacked at some point in between 2535 and 2552.
- Chi Rho was attacked at some point between 2535 and 2552.
- The Battle of Ballast takes place at some point between 2551 and 2552.
- ↑ 1.0 1.1 1.2 1.3 1.4 Halo Wars - Collectible: Halo Wars Timeline Events
- ↑ Xbox.com Halo Storyline (Defunct, Copy on HBO Forums)
- ↑ Halo Wars: Genesis - pages 8-9
- ↑ Halo: The Fall of Reach - page 135
- ↑ Halo: The Fall of Reach, page 190 (Digital)
- ↑ Halo: The Fall of Reach - Page 272 (Digital), 238 (Physical)
- ↑ 7.0 7.1 Halo 2: Anniversary - Terminal: ONI File: Honor Bound
- ↑ 8.0 8.1 Halo: Ghosts of Onyx - Chapter 20: Page 173
- ↑ 9.0 9.1 9.2 Halo Waypoint: Videos - Hero (Courage) (Defunct, Copy on Youtube)
- ↑ 10.0 10.1 Halo: Evolutions - Essential Tales of the Halo Universe - Dirt: Page 313
- ↑ Halo Waypoint: Universe - Characters - Olympia Vale
- ↑ 12.0 12.1 Halo Encyclopedia - Page ??
- ↑ Halo: Reach - ViDoc: A Spartan Will Rise
- ↑ Halo: The Fall of Reach - Page 251 (2010)
- ↑ Halo Encyclopedia - Page 208 - The Fall of Reach
- ↑ 16.0 16.1 Halo: Reach - Level: Winter Contingency
- ↑ Halo: Reach - Level: Nightfall
- ↑ Halo: The Fall of Reach, page ??
- ↑ Halo: Combat Evolved - Level: The Pillar of Autumn
- ↑ Halo Waypoint - Ten Twenty
- ↑ Halo: First Strike - Pages 328-333
- ↑ Halo 3 - Level: Floodgate
- ↑ 23.0 23.1 Halo 2 - Level: Cairo Station
- ↑ Halo 2- Level: Metropolis
- ↑ Halo 2 - Level: Delta Halo
- ↑ Halo 2 - Level: The Great Journey
- ↑ Halo 3: ODST - Level: Coastal Highway
- ↑ Halo 3 - Level: The Ark
- ↑ 29.0 29.1 Halo Waypoint: Universe - Locations - Tribute
- ↑ Halo: Reach - Level: Lone Wolf
- ↑ Halo 2 - Level: The Heretic
- ↑ Halo: Reach - Level: The Pillar of Autumn
- ↑ Halo: First Strike - Chapters 33-35
- ↑ Halo Legendary Crate - Bonus Item: First Twelve Hours
- ↑ Halo 2 - Level: Outskirts
- ↑ Halo: Uprising Issue 1
- ↑ Halo 3 - Level: Floodgate
- ↑ Halo: Fractures - Into the Fire, page ??