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25th century

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In 2453, the human colony of Aleria starts to suffer a severe drought which would still be ongoing by 2556, with no rainfall in 103 years.[1] By that point, the drought had devastated the planet and allegedly killed half of its inhabitants.[2]


  1. ^ Halo: Nightfall, ONI: Trade Barriers
  2. ^ Halo: Nightfall, Chapter 3