Ceasefire in 2552 with one of the alien factions. Fighting kept going for a while more, but the Covenant never had enough firepower to pull things on that scale again.
In my time, Earth and her colonies were some 800 strong, spread across the galaxy. When the war ended, that number was closer to 200. Casualty numbers aren't exactly easy to estimate, but. Over half of all humanity, at least, were killed during the war.
[ billions of lives. what wash won't mention is that, even in the face of a literal alien threat, humanity still wasn't great at not fighting with each other. more of his time was spent fighting people than aliens, something he's deeply bitter about. ]
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In my time, Earth and her colonies were some 800 strong, spread across the galaxy. When the war ended, that number was closer to 200. Casualty numbers aren't exactly easy to estimate, but. Over half of all humanity, at least, were killed during the war.
[ billions of lives. what wash won't mention is that, even in the face of a literal alien threat, humanity still wasn't great at not fighting with each other. more of his time was spent fighting people than aliens, something he's deeply bitter about. ]