Battle of Tsavo

The Battle of Voi took place in late 2552 between the UNSC Defense Force/Covenant Separatist Alliance and the Covenant Loyalists in the area in and around Voi, Kenya.

Background
The Battle of Voi took place during an UNSC operation to keep the Prophet of Truth from activating the Ark. Spartan-117's mission was to clear out the Anti-Air Wraiths around Voi so that Fleet Admiral Hood could launch a low-level strike on what was the supposed Ark. It continued when a Flood ship slipped in. The Battle was won by UNSC forces due to the Portal opening and the subsequent arrival of the Flood. The battle concluded with Covenant Separatist Ships glassing East Africa.

Beginning
When the Prophet of Truth smashed through Earth's space bound defences and began to land his forces on Earth, eradication of the human race was a secondary objective, as a result, when they occupied Voi, pockets of Marine forces still existed within it. There had been counter attacks before the start of the battle, resulting in heavy casualties and the patches of Marine defenders were hard pressed.

Sierra 117 Arrives
After his battle to fight his way up the Tsavo Highway, Master Chief not only secured the gate to Voi but also a landing zone for Commander Keyes to deploy her Marines. Mounting up with a group of Warthogs, he rode shotgun through the gates to the outside of the Traxus facility where previous Marine counter attacks had failed. Ten marines dismounted from the Transport Warthogs along with the Chief and then a few remained to operating their Warthog LRV to give them heavy support. The Traxus facility composed of several areas, each sealed off by a bulk head to allow and deny movement between the areas. after initially infiltrating the facility the first gate was opened, interrupting a File of Jackals and Grunts during one of Truth's speeches. They were taken by surprise and quickly gunned down. After quickly hammering through another File of grunts Chief opened the second grunt, opened the warthog to a long tunnel heading down the facility. A large group of Grunts, Jackals and a single Brute Captain guarded the end of the corridor, along with their reserve Ghost RAVs. After the combined arms of the Chief, the Warthog and the Marines defeated the defenders they finally broke through to their first objective.

The First Objective
In the dried out dockyard outside, the first Type-52 Anti Aircraft Artillery lay, lending its weight to an aerial dog fight between Hornet Gunships and Banshees. It was guarded by a trio of Ghosts and numerous Type-52 Troop Carriers came in to cover the ground forces. The UNSC Forces punched upwards, securing a UNSC held dock office after initially being pushed back from it and used the LAU-65D/SGM-151 SAM turret at the base to beat back Covenant armed forces. After destroying their objective they pushed onwards, destroying the Wraith that defended the doorway back into the Traxus Facility.

Regroup
Inside the UNSC Forces still held parts of the facility but were being pushed back by a assault being headed by a Brute Chieftain. In there a Marine fire team operating a AIE-486H Heavy Machine Gun held the Covenant at bay, at least for a time. A Marine squad headed by Spartan-117 pushed in and killed the Brute Chieftain and his bodyguards attempting to oust the Marine defenders. After opening the next bulkhead for the Warthog supporting them they were ambushed by a swarm of Drones that descended from a Phantom overhead. After forcing them into a retreat the Master Chief and the Warthog linked up with a Marine Anti Tank unit armed with M41 SSR MAV/AW that had requestioned four M274 Mongoose ULATV to use as improvised fast attack light anti armor vehicle. A Marine offered Spartan-117 the controls of his Mongoose and he lead them out into the next Dock.

The Second Objective
In the next dried dock a pair of triple A Wraiths battered UNSC air forces but this time they had significantly more defensive measures. A number of Ghosts and Chopper RAVs defended them against UNSC counter attack. The Marine mounted Anti Tank unit, the supporting Warthog LRV and a number of troops defending the actual dock with conventional arms and a series of SAM Turrets. Covenant forces were beaten back and their AA batteries destroyed but they refused to cede defeat, bringing in Ghost reinforcements on Phantoms. They were all defeated in turn, leaving the UNSC forces a quick breather and a chance to bring in more mounted Anti Tank units before they gave one last push to retake the dock. A Type-47 Ultra Heavy Assault Platform better known as the Scarab crawled over the roof tops and engaged the mounted forces in the dock. The Marines had a choice whether to disable its legs to cripple it and bring it low then board and destroy its power core or to buy time for the Master Chief so he could use one of the Dock Cranes to board it. In time, it was defeated and destroyed, giving the UNSC forces breathing space to make their push for the final objective.

Push to the AA Gun
Master Chief soon travelled up to the dock and was joined by another squad of reinforcements led by The Arbiter and moved through to another section of the Traxus facility, another section held by the Marines. It served as their local command centre, their medical station and their ammo dump. It was heavily fortified with numerous defensive points armed with machine guns but at the other end of the base, where it entered the warehouse they defensive position was falling. Brute forces had pushed back through the warehouse, flanking their defensive position. UNSC Forces, now joined by Voi dock and factory workers and led by the Arbiter and the Chief soon pushed back, retaking the warehouse and defeating large groups of Brutes and even a Hunter pair before a showdown with a Chieftain outside. After more tight street to street fighting, they pushed the Covenant forces back to the rocky precipice where the AA gun lay. With no way for the Brutes to retreat and with Lord Hood's attack imminent it was make or break time. UNSC forces pushed up the hill, fighting off another Chieftain, numerous Grunts and Jackals, the Chieftain's pack and several hastily planted Plasma Cannons. After defeating the forces guarding it they destroyed its rapidly overheating core and cooling system to cripple it and waited as Lord Hood's attack commenced.

Activation of the Artifact
Soon Longsword fighters filled the air, followed by three Frigates, led by the UNSC Forward Unto Dawn. A wave of missiles then MAC rounds struck Truths ship at the centre of the artifact but to no avail. The ship proved quite invulnerable and it did nothing to stop it from activating the artifact. The results surprised the UNSC however, with it creating a portal through which the Covenant forces left, leaving the UNSC dazed and confused. However, their attention quickly changed when a CCS-class Battlecruiser slipped in and crashed in one of the dried docks of Voi. Though initially thought to be Brute controlled, the truth was far more sinister.

The Floodgate opens
The victorious UNSC forces were now encountering unknown hostiles all over the Town and the splintered and weary forces were no match. The Flood had found their way to Earth and begun to infect and spread. Commander Keyes gave a single order, which was to fight to the core of the ship and overload its reactors, destroying the ship and the town and any Flood along with it. Master Chief and the Arbiter headed back into the Town to outside the warehouse facility to see the true face of their enemy. A pair of retreating marine fire teams were ambushed by Combat Forms and Infection Forms, leaving their infection as inevitable. Spartan-117, the Arbiter and the survivors had to inevitably turn their guns on thier former comrades. After pressing through the warehouse officers and then the warehouse they linked up with more survivors and pressed on. The route to the command centre had been closed off so now they had to find another way around. Using Fusion Cores as improvised explosives and a M7057 Defoliant Projector as a ad hoc anti Flood weapon, they circumnavigated the bulkhead and entered the unusally empty command centre. with a single, delrious survivor, the UNSC forces continued to push to the downed ship to meet their new allies.

The Fleet of Retribution
The Elite Fleet, the Fleet of Retribution, had followed the Flood infected ship from their blockade at Delta Halo to its arrival at Earth. They began to drop Elite forces to push towards the ship, seeking a prize that lay within it. It wasn't until they came back into Traxus Facility that the Elites told the UNSC. Cortana, the AI formally attached to the Spartan-IIs, the Pillar of Autumn and companion of Master Chief was upon that downed ship. The joint UNSC/Elite forces pressed on, still giving their all to getting to the crash site. They eventually broke through, fighting past Flood Pure Forms. With the remaining forces giving cover to the Chief, he entered its Floodformed carcass and retrieved Cortana. After the ground forces were evacuated safely the Elites began to glass the immediate area, annihilating any chance of further Flood infection, effectively ending the Battle of Voi.

Trivia

 * The fourth mission of the Halo 3 campaign, The Storm, takes place during the latter end of the Battle of Voi.

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