The purpose of aqueducts was
to defend Rome against invaders
to bring water to the cities of Rome
to create a series of roads for travel outside the empire
to use for transportation in trade through water passages

Aqueducts required a great deal of planning. They were made from a series of pipes, tunnels, canals, and bridges. Gravity and the natural slope of the land allowed aqueducts to channel water from a freshwater source, such as a lake or spring, to a city.

disease was the number one killer of native peoples. they had had little exposure to the diseases of europe. this led to some villages being almost completely wiped out and some tribes destroyed.