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 * Covenant forces begin to swarm into the Outer Colonies. For several years the war falls into a pattern: Humans win isolated battles, typically during ground operations, but at a horrible cost. In space, the Humans are losing at a precipitous rate, and one by one, the Outer Colonies fall.
 * Siege of the Atlas Moons: Danforth Whitcomb distinguishes himself in this engagement.
 * Battle of New Constantinople: SPARTAN-III Alpha Company recieves a commendation for bravey in this engagement.
 * Battle of New Harmony: UNSC forces win a strategic victory over the Covenant at New Harmony by locating K7-49.
 * Operation: PROMETHEUS: SPARTAN-IIIs attack K7-49. The facility is destroyed, resulting in a UNSC victory, but at the cost of all three hundred Spartans.