This may not be right but probably the big effect was it killed alot of people.
Answer: The Aztec Empire grew as it conquered neighboring states, but that growth came at a cost. ... During the time of Montezuma II's reign the empire was at its peak, but so was the resentment of the subject tribes. Constant rebellions were waged. Although Montezuma defeated the rebellions, they weakened the empire.
Explanation:▶CREDIT/SOURCE◀
https://www.britannica.com/summary/Decline-of-the-Aztec-Empire
This is a tricky question. All starting peoples had to hunt and gather food. However, this question asks for a civilization. A generalization answer would be foraging cultures, such as the <span>Dobe Ju'hoansi group in Africa or pastoral societies. </span>
During 1931-1945(world war 2) japan became to build up and later went to war with the united states (August 1941 The Battle of Pearl Harbor)
hope this help
<span>White settlers came to the Seattle area in 1851, establishing a townsite they first called New York, and then, adding a word from the Chinook jargon meaning "by-and-by," New York-Alki. They soon moved a short distance across Elliott Bay to what is now the historic Pioneer Square district, where a protected deep-water harbor was available. This village was soon named Seattle, honoring a Duwamish Indian leader named Sealth who had befriended the settlers.</span>
