The Second Battle of Mombasa was a bloody engagement between UNSC and Covenant Loyalist forces, depicted in the John-117 Monument. The battle itself, or at least some of the events depicted, never actually occurred, but it serves as a summary of the final days of the Human-Covenant war and John-117's ultimate sacrifice.[1]


On October 20, 2552, the Prophet of Regret, having suffered heavy casualties on the ground at the hands of John-117, entered Slipspace from within New Mombasa, unleashing a powerful explosion that caused great damage to the city - heavy enough to sever the city's space tether, causing its catastrophic collapse onto the Kenyan Savanna. The severed Covenant ground forces and the UNSC defense forces surged forward into the city to secure whatever prize or tactical advantage the ruins might have held.

Later, Human and Covenant forces clashed again in the ruins, both forces surging forward to capture it. The battle took place in the weeks immediately after the Prophet of Regret's retreat to Installation 05, lasting until John 117's return to Earth aboard the Prophet of Truth's Forerunner dreadnought.

Elements from both the 506th Tank Regiment and the 77th Marine Regiment battled furiously for it, with snipers from both sides taking a heavy toll upon the enemy. Ultimately, the battle lasted seven days, with the UNSC forces in a desperate situation. With ammo becoming scarce and all hope seeming lost, that is when John-117 stepped into the battle.


Battle for the Landing ZoneEdit

The battle began on the outskirts of New Mombasa, where UNSC and Covenant forces engaged each other in a bitter fight for control of a Landing Zone. The UNSC never gained full control of it, always being pushed back by the Covenant whenever they seemed to secure it and vice versa.

The Northern Bridge FallsEdit

Despite a valiant defense by the Marines, there was no way they could hold the bridge for much longer. With Brute forces surging over it and hitting the Marines' vulnerable flanks, there was only one option remaining. At 14:00, the order came through to destroy the bridge, to force the enemy down into the Valley where UNSC trenches lay to slaughter the enemy with fire from elevated positions. However, this was not the case as the Covenant forces had already begun to surge down the trenches with the destruction of the Bridge.

The HillEdit

The most ferocious and bloody bottleneck in the battle, the UNSC forces sent to defend it took 2/3rds casualties. After the second bridge was destroyed, the trenches at the foot of here, a last ditch defensive measure, came under heavy attack, garnering heavy Marine casualties.


Snipers from both sides battled for control, with UNSC Snipers fighting on one end of the destroyed southern bridge and Covenant Jackal snipers halting Marines outside the Landing Zone before being routed by UNSC infantry and tanks.

The 506th arriveEdit

Tasked with securing a road to the southern bridge span, the 506th Tank Regiment plowed forward, taking heavy casualties. Though outnumbered, they took their objective, leaving a path for the second wave of UNSC infantry to follow.

John's Gambit Edit

It was at the top of the "Hill" bottleneck that John-117, launched a gambit to retake the hill for the UNSC forces, by allowing himself to be captured by Brute forces there.

Other Notable UNSC CombatantsEdit


  • This battle was portrayed in the lead-up advertising campaign prior to Halo 3's release. The fashion in which it is portrayed is considered to be non-canon. It was part of Microsoft's Halo 3 Ad Campaign and not Bungie's work. Microsoft at that time had no control or idea of Halo 3's story, and therefore it is not present in said canon. Also, it does not appear in Halo 3 or Halo: Uprising.
  • There are no Elites shown in this battle, this is because their fleet, although had established an alliance with Humanity, did not officially arrive back at Earth until the battle of Voi (aside from the The Arbiter).


See alsoEdit


  2. GameTrailers "The Museum" video
  3. 3.0 3.1 3.2 3.3 3.4 3.5 3.6 3.7 3.8 3.9 "Believe" Halo 3 site
  4. Halo 3, Believe video, Gravesite