In 1860,Abraham Lincoln was elected as U.S. president but his election was accepted by many southern states who decided to secede from the U.S. and form the Confederate States Of America with 6 other states(and eventually 11 all together)
cause-Lincoln had only won the election with 40% of the popular vote,which meant that the majority of the country did not support his ideals-especially anti-slavery sentiment.
In April 1775 British soldiers, called lobsterbacks because of their red coats, and minutemen the colonists' militia exchanged gunfire at Lexington and Concord in Massachusetts. Described as "the shot heard round the world," it signaled the start of the American Revolution and led to the creation of a new nation. :)
Chinese Americans were more of a threat according to the government.