From Halopedia, the Halo wiki
Operation: DAYBREAK, a series of Office of Naval Intelligence research facilities and sensor relays are located in this area. On July 16, 2558, northeastern Saviron was attacked by Jul 'Mdama's reformed Covenant faction and their Promethean allies. A joint Spartan-Marine operation took place to defend the planet. Only minor damage was inflicted to colonization equipment on the continent before the Covenant and Promethean forces were eventually repelled.
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