Zeta Halo project - Halopedia, the Halo wiki

The Zeta Halo project or Zeta Halo operation was a Unified Earth Government initiative to study, decommission, and occupy Installation 07, the fourth Halo ring to be discovered by modern humanity. Overseen by Doctor Bob Casper, it involved both a scientific outpost and a large military presence. The

Cortana (Halo) - Wikipedia

Cortana - Character - Halopedia, the Halo wiki

UNSC Infinity, Halo Alpha

Foundation - Campaign level - Halo Infinite - Halopedia, the Halo wiki

Zeta Halo (Installation 07), Wiki

Jiralhanae, Halo Alpha

Installation 07 - Halopedia, the Halo wiki

How did Zeta Halo get destroyed?

Security - Armor - Halopedia, the Halo wiki