<span>The controversy over the election drove a compromise that ended reconstruction.</span>
<span>He was a German mathematician and astronomer who established a set of laws to describe planetary motion around the sun.</span>
Answer:
these amendments were intended to guarantee the freedom of the former slaves and grant certain civil rights to them and protect the former slaves and all citizens of the United States from discrimination.
(long story short, they were needed during that time)
hope that helped <3
It did complex calculations needed to accurately fire artillery.