The man responsible is named John Rolfe.
They started the korean war to prevent the spread of communism cause they associated communism with Russia. They did not like Russia .
"The Cuban Missile Crisis was Russia getting ballsy and really mad at us (Likely due to us having missiles in Turkey that could hit them)
And the Vietnam War was started for the same reason as the Korean War"
Congress was split, as the French had helped the young United States during the Revolutionary War, however, many where confused what direction the revolution was going (spoiler alert, the French Revolution traded a monarchy for a dictatorship with Napoleon at the helm - so it didin't accomplish a whole lot).
Although both parties(the Democratic-Republicans and Federalists) had different hopes for the french revolution, they both agreed that war would be economically not possible and would possibly open the U.S up to attack, so the U.S remained neutral.
The answer is election of 1860
The 1860 election happened when during the rise of major political groups that have differing principles.
The Republicans strongly support the abolishment of slavery while the democratic party support to keep the slavery system.
In the end , The Republican party (that led by Abraham Lincoln) won that election.