During the Battle of Ephyra, a large Locust force was marching across Chancery Bridge, threatening to march right into the city along with the thousands of other Locust troops moving into the city. The COG Army commander stationed at Chancery Bridge needed the Hammer of Dawn to destroy the bridge so the Locust forces moving across it would be destroyed. Marcus Fenix, who was fighting with his squad against a Locust force that was marching across Chancery Bridge, was given a Hammer of Dawn targeting laser to destroy the bridge so the Locust force could not reach the city. However, he received a distress call from his father, Adam Fenix, and went off to go rescue his father, leaving the Hammer of Dawn targeting system behind, but accidentally taking the front targeting reticle with him. The