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 * The Insurrection of Mamore takes place on Mamore.
 * The Battle of New Constantinople is fought.
 * The Battle of Leonis Minoris ends in a Covenant victory as the Leonis Minoris colonies are glassed.
 * Heavy conflict takes place in the Bonanza Asteroid Belt, distinguishing the Spartan-III Alpha Company.
 * Operation: PROMETHEUS. The Spartan-III Alpha Company destroys a Covenant shipyard on asteroid K7-49, but most of the 300 Spartans were killed in the process.
 * Beta Company of the Spartan-III's is authorized.
 * The 2nd class of Spartan-IIs are conscripted. One of them is Yasmine Zaman.