A. War with the Etruscans.
<span>Protestant Europe had more military power than originally thought </span>
Cahokia was one of the largest and possibly the capital city of the people that are referred to as the Mound Builders. Cahokia's size and the large number of people that lived there led to the main issues. Bad droughts and poor harvests meant people couldn't eat.
The development of small villages into the first cities was known as "<span>b. Urban revolution," although this should not be confused with a more modern term in which people congregate more in pre-existing cities. </span>