Concord was established as an Outer Colony in 2490 due to its ideal position relative to slipspace routes and its high concentration of precious mineral deposits. These features made the planet an attractive location for the headquarters of Lethbridge Industrial, a corporation that specializes in gravitic control systems and components for MJOLNIR Powered Assault Armor. In late 2551, Concord was attacked by an unusually small Covenant force, but the combined efforts of the UNSC and Concordian militia were able to repel the alien invaders. This rare victory allowed Concord to survive the Human-Covenant War relatively unscathed.