The INSIDER summary:
- The White Walkers are the main antagonists in "Game of Thrones" and are coming to attack the world of men in season seven of the TV show.
- The Great War is the battle between men and the White Walkers and their army of wights, unfortunate people the White Walkers have resurrected.
- The White Walkers were created by the Children of the Forest as a defense against men, but this backfired.
- Jon Snow and the red priests and priestesses of R'hllor are trying to warn the realm of this most important battle.
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