Answer:
The worry that more slaves states or free states would upset the balance of power and lead to a civil war
Explanation:
Columbus believed he had reached Asia when he had traveled less than halfway there because geographical knowledge at the time was limited. They believed if they sailed West they would reach Asia by sea but actually ended up in the Americas. He thought the world was smaller than it actually was.
The United States became involved in World War II only "<span>c. after Japan attacked Pearl Harbor," since this represented an unquestionable act of war against the US that needed to be avenged. </span>
