The correct answer is <span>A. Porter is writing social history because he is focusing on lives of large numbers of ordinary people.</span>
Answer:
The establishment of three U.S. army forts along the Bozeman trail through Lakota annexed Crow Indian treaty territory caused Red Cloud's war. The Crows fought back against the Indian trespassers by helping the troops in the very same forts that Red Cloud wanted closed.
Explanation:
<span>Gregorian calendar was used during the 16th Century. </span><span />
