The greatest was Tenochtitlan
The bacterial life began to mix- the Colombian exchange- and new diseases were introduced <span>to American populations that had no prior experience of them. The results were devastating. These populations also were introduced to new weeds and pests, livestock, and pets. New food and fiber crops were introduced to Eurasia and Africa</span>
European Imperialism was a period of colonial expansion. It is the most important cause of WW1 because it built tension between the countries. It caused Tension between Nations and Countries. Was a cause of WW1 by separating from where they stand to form another empire away from their old empire, to avoid dictatorship.
