All civilians not evacuated within the first few hours of the battle killed
The Battle of Reach, alternatively called the Fall of Reach or the Prelude to the finding of Installation 04, was an incident that took place during the Human-Covenant War, that revolved around Reach. The Battle began when the Covenant attacked the Human fortress of Reach, devastating the air defences and glassing the planet. Since Reaper reinforcements were many light years away, the Humans were relying on the many Spartan teams stationed on Reach to defend it, including Noble Team, which had Jorgey in it, and Red Team, which had Johnny in it. Despite the best efforts of the Spartans and the Humans, Reach fell, and many were killed. Jorgey survived the battle when he sacrificed himself to destroy a Covenant Supercarrier using a portal, only for him to be pulled through and land on Requiem. Johnny also fled the battle in the Pillar of Autumn.
Despite the Humans losing this battle, it made no difference to the outcome of the war. The Humans lost very few battles from then on because the Reapers decided to station their forces at the edge of each star system within response range, preventing the Covenant from carrying out surprise attacks, and soon after the Covenant fell due to the actions of Arby, Johnny and Cortana.
Jorgey watches in horror as the UNSC Grafton is destroyed by the Long Night of Solace
Covenant forces glass the Reachian city of New Alexandria, described to be the 'crown jewel' of the planet