Born on Carter's World in 2506, Harrington grew up in a large family. During his childhood, he befriended Andrea King, and they became childhood sweethearts. When they were old enough, they married, and they both became mechanics at the spaceport in the primary city. In 2532, disaster struck when the unmerciless covenant invaded their world. It was Andreas birthday, and she went to the spa while Harrington took her shift. They attacked the spaceport in their first wave, and Harrington was critically injured. The humans managed to fight them off away from the spaceport, but by this time the rest of the city had been breached, along with half a dozen other cities scattered along the planet. Harrington was evacuated to a ship in orbit but his transport was attacked by a group of Covenant Sera