Battle Over Installation 00

The Battle Over Installation 00, referred to as Operation: RESOLUTE HOPE by the United Nations Space Command, was the penultimate battle and the climax of the Forefather War. The battle was almost entirely fought above Installation 00, with only limited ground combat.
==Background==
Despite the Galactic Alliance's newfound ability to counter S'southi Tactics with moderate efficiency, the S'southi continued to hold a severe advantage over the Alliance, were slowly fighting their way through the Inner Colonies of the UNSC, and were close to achieving victory in the conflict.
The re-emergence of the ancient ancilla Offensive Bias gave the Alliance a much-needed morale boost, however it did not prove enough to turn the tide, leaving the Galactic Alliance in a desperate state. Formulating a plan with 001 Anguished Deliberation, the monitor of Installation 01, it was decided that the Galactic Alliance would muster all of it's remaining vessels and force the S'southi into a trap designed by James Coleman.
The Alliance re-activated the Portal to the Ark in Voi and massed their fleets above Installation 00 and fed information to the S'southi. The overconfident and rampant Binding Enlightenment ordered Sark to have all available forces sent to the Ark and to have it - alongside the Alliance's forces, annihilated. Unknown to the Forefathers, the Alliance had prepared a plan that was, in theory, capable of destroying them completely.
==Engagement==
===Initial Engagement===
"This is the galaxy's final stand. Make it count."
- Cobadarama addressing the Galactic Alliance fleetThe S'southi Armada began to arrive early on the 26th of August, immediately being encountered by the Galactic Alliance fleet that was mustered above the Ark. Immediately a series of brutal skirmishes began with the S'southi hoping to achieve a swift and decisive victory. In spite of the S'southi's far superior fleet in every regard except numbers, the Forerunner Ancilla Offensive Bias's highly efficient and highly lethal tactics resulted in the Galactic Alliance's fleet managing to hold out for far longer than it had in any previous direct engagement.
S'southi forces were entirely focused on the obliteration of the Alliance's fleet mustered above the Ark, and therefore the limited forces they deployed to the surface were wiped out by the installation's sentinels, who had begun to reinforce the Galactic Alliance fleet in the battle raging on above. Despite this, the S'southi were still a superior force and the Alliance was suffering extremely heavy casualties.
===Deepening Conflict and the Second Fleet of Divine Purity's Arrival===
The battle raged on overnight, and by the morning of the 27th of August the Second Fleet of Divine Purity had arrived to reinforce the Alliance's fleet. The arrival of these much-needed reinforcements helped the Alliance prolong the battle until Installation 01 could arrive, something that would be necessary if the GA wanted to survive the engagement.
===Arrival of Installation 01===
"Unexpected, but not unwelcome."
- Khisze 'Hagramai 
Installation 01 arrived some time after, with the S'southi forces on the installation having been defeated during the ongoing battle on the ring's surface. Binding Enlightenment immediately saw through the Galactic Alliance's plans, however, and went to personally halt the firing sequence. The Flood used this opportunity to break the containment barrier around High Charity to attempt to infect the S'southi fleet positioned above the crash site, however the S'southi vessels managed to defeat the incoming flood forms. Despite this, a Galactic Alliance frigate was captured by the flood and rapidly used to deploy Flood forces to Installation 01 where they intended to halt the firing sequence and take control of the ring.
The S'southi Armada had, by this point in time, gained a definitive upper-hand in the engagement above the Ark and the Galactic Alliance's fleet was on the verge of routing and collapsing into disarray, but this was only temporary as the morale of the fleet was boosted by a speech given by Cobadarama, Khisze 'Hagramai and Kayode Adetola. Knowing that Installation 01 was about to fire and wipe out all life within it's range, the Galactic Alliance fleet began to withdraw through a second portal opened above the Ark. Binding Enlightenment, in a fit of both rampancy and overconfidence, ordered the S'southi fleet to not pursue and rather to focus on the occupation and destruction of Installation 00 while he dealt with the Halo.
Meanwhile, on the surface of Installation 01, Binding Enlightenment and the rest of the Forefathers were killed in action by Spartans John-117, Theo-783 and Rose-788 alongside the ODST Victoria Theodorides. With all S'southi leadership now dead, the fleet dissolved into chaos for only a few mere moments before Installation 01 activated and wiped out the entire S'southi Armada. John-117, Theo-783 and Rose-788 had fled into slipspace in Binding Enlightenment's shuttle and were spared from the firing of the ring, being the last Galactic Alliance forces to disengage from the battle.
==Aftermath==
With the entire S'southi Armada obliterated, what little remained of the S'southi navy within the Milky Way were quickly mopped up by the Galactic Alliance, who now held a gigantic numerical advantage over them. The Forefather War effectively ended with the activation of Installation 01 as a result.