<span>Enlightenment ideas about government provided a philosophical basis for the revolutions of the late 1700s and early 1800s. they replaced them with more democratic forms of government. They also triggered a series of nationalist uprisings that let to the formation of new nation-states.</span>
Abraham Lincoln was the president and the Commander-In-Chief during the war, which is the highest military rank.
Ulysses Simpson Grant was Commanding General of the Union (North) along with Abraham Lincoln. Many people believe that General Grant was the commanding officer, so I would go with Ulysses Simpson Grant.
Major Anderson taught Beauregard artillery at west point, which his former student used against his teacher when Anderson commanded fort sumter. I hope this helps!