Battle of Installation 04

The Battle of Installation 04 was a conflict that took place during the Human-Covenant War, centered around the Halo Ring known as Installation 04. The conflict started when the Pillar of Autumn fled Reach via slipspace and ended up floating near the ring, with the Covenant not far behind. As the Humans began evacuating their ship, Johnny was awoken from cryo-sleep to take Cortana off the ship and defend her at all costs. After leaving the ship in a  lifepod, Johnny watched the Pillar crash-land on the ring, followed by several Covenant ships including the Truth and Reconciliation.

Johnny landed on the ring and began rounding up Marines to help save Captain Jacob Keyes, who had been captured by Covenant. Johnny was followed all over the ring by Zuka Zamamee and Yayap, who were determined to kill the Spartan, but he was able to evade them and rescue the Captain. After Keyes was free, the Human forces rallied around Alpha Base and made plans to find the control center of the Halo Ring. It was therefore necessary for the Humans to assault the Silent Cartographer, which they did so and were able to locate the control center of Installation 04.

Meanwhile, Zuka was still pursuing Johnny and Cortana but things were escalating in the depths of the ring. The Covenant had accidently released an alien parasite known as the Flood, and when Johnny did find the control center Cortana desperatly directed him towards the swamplands of the ring to head off Captain Keyes, who was about to happen upon one of the Flood containment facilities. He was too late, however, and the Captain was taken by the Flood which began annihilating the Covenant all over the Installation.