what if Lief Eriksson and the Norse, when colonizing Vinland, brought a large number of horses with them, for whatever reason.
(if they didn't arrive on continental America IOTL, let's assume they did ITTL).
so the Vikings bring a lot of horses to America with them, and even if the colonies die out AIOTL, the horses remain and breed. there is almost five hundred years between the Norse colonization and when Columbus begins his first voyage, so what effects would horses have on the natives in the time before then (1000-1500?)
(if they didn't arrive on continental America IOTL, let's assume they did ITTL).
so the Vikings bring a lot of horses to America with them, and even if the colonies die out AIOTL, the horses remain and breed. there is almost five hundred years between the Norse colonization and when Columbus begins his first voyage, so what effects would horses have on the natives in the time before then (1000-1500?)