Halo: Collateral Damage
From Halopedia, the Halo wiki
Halo Collateral Damage: A Master Chief Story, or simply Halo: Collateral Damage, is a three-chapter mini-series produced by Dark Horse Comics that focuses on a young teenage John-117 during some of his early days in the Human-Covenant War. Collateral Damage is written by Alex Irvine, whose previous contributions include Halo: Tales from Slipspace's story Something Has Happened and Halo: Rise of Atriox Issue 4. The comic miniseries also shares narrative connections to the other works in the A Master Chief Story series, primarily the novel Halo: Silent Storm from author Troy Denning.
Halo: Collateral Damage takes places on December 3, 2525, and follows the Master Chief and Blue Team as they are deployed by the UNSC to an unstable colony world. Their mission: to terminate the Covenant's efforts to uncover something ancient and powerful beneath the planet's surface. However, as the mission takes a turn for the unexpected, the Spartan-II strike team realizes that the stakes of their mission are higher than they imagined, and they'll have to rely on each other and a small group of human rebels to survive.
At some point during development, Collateral Damage was named Halo: Forefront.