Groombridge 1830 system
From Halopedia, the Halo wiki
The Groombridge 1830 System was a UNSC-colonized star system, located 29.7 light years from Sol.[1] It was invaded on December 24, 2530 by the Covenant. Admiral Preston Cole's fleet responded, destroying the Covenant fleet, but taking heavy casualties during the battle. The colony's fate, whether it was glassed or not, and the state of any survivors, is unknown.[2]