The Citadel is an archive of information for George R.R. Martin's A Song of Ice and Fire.
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How were the Other's defeated 8K years ago? In large numbers, they seem like they'd be invincible. Because their offensive against the Wall was checked, does that constitute a defeat? Was there a Human counterattack?
Well, it was thousands of years ago, so many of the facts are lost in the mists of time or have become legend. You will learn more in future volumes... but probably not everything, no...
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