Swords of Sanghelios’ campaign stands apart from the main game's story, taking place on Sanghelios in early 2553. It follows the return of Arbiter Thel 'Vadam to his homeworld at the end of the Human-Covenant War, and chronicles his efforts to reunite his people and establish the Swords of Sanghelios. Opposing him are the Covenant-faithful Servants of the Abiding Truth, and Sangheili bandits formed in the chaos of the Schism.