Collapse of cities (1 ene 800 año – 1 ene 900 año)
Descripción:
Around 800 - 900 AD, because of overpopulation, lack of resources, increase in warfare, and workers being sacrificed, many cities were abandoned and people migrated to the Northern Highlands.Añadido al timeline:
fecha:
1 ene 800 año
1 ene 900 año
~ 100 years