So I was talking with @goodqueenaly about the whole Season 6 revelation that the Children of the Forest created the White Walkers, and our conversation crystallized some problems I have with this twist. 

1. If the White Walkers were a weapon, why weren’t they used during the war between the First Men and the Children during the Dawn Age, given that that war was an existential crisis for the Children where they brought down the Hammer of Waters on the Arm of Dorne and the Neck?
2. Why the two thousand year gap between the Pact that ended that war and the Long Night, which is the first recorded encounter between humans and White Walkers? 
3. If the Long Night was so centered on Westeros, why are there records of the conflict across Essos, from the Rhoynar in the west (who tell of the hero of the Rhoyne who sang the secret song to bring back the day), to Asshai (where the legend of Azor Ahai was born), to the Bone Mountains (where the patrimony of Hyrkoon the Hero was founded), to Yi Ti (where the woman with the monkey’s tail saved the world from the Lion of Night, and the Pearl Emperor built the Five Forts to guard his lands from the Lion’s demons)?