Pegasi Delta

Pegasi Delta was a small world in the 51 Pegasi-B System. The surface of the planet was made of red rocks and sand. Orange dust permiated the sky. It had seas that were unusually rich in Deuterium and Tritium, usable in the reactors of Covenant ships. The world orbited around a faint yellow sun.

During the Human-Covenant War, the Covenant forces constructed a massive refinery on Pegasi Delta. With its close proximity to UNSC space, Pegasi Delta became a massive forward resupply and refueling line for the Covenant ships making incursions in UNSC space.

In 2545, the UNSC sent in 300 Spartan-III supersoldiers from Beta Comapny to destroy the refinery in Operation: TORPEDO. They successfully destroyed the refinery, crippling the Covenant supply lines, but with a 99.3% casualty rate; 298 of the 300 Spartans of Beta Company were killed.