The irrigation systems helped to water crops in large fields and make sure rivers don't overflow or [under-flow]<span />
Answer:
<h2>The U.S. government decided to exit from the region, ending the Red Cloud's War with the second Treaty of Fort Laramie in 1868.</h2>
Explanation:
<h2>Hopes this helps. Mark as brainlest pls!</h2>
The industrial Revolution created a demand among American and European business men, and consequently politicians, for new markets.
