From Halopedia, the Halo wiki
The Vevina sector contains the Epsilon Indi system. It borders the Polona and Grenadi sectors, with the Grenadi being the closet to the Sol system of the three.[note 1] Humanity had established colonies within the sector, including Harvest in the Epsilon Indi system, by the time the Covenant first declared war on humans and it was the first to be invaded.
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