1。 The root of all wars should start with economy and interests. At that time, the capitalist industrial and commercial economy was in the north and the slave plantation economy was in the south. Lincoln himself was an opponent of black slavery, which became his presidential campaign slogan. He came to power to liberate slaves, and the South had to quit. In addition, there are also great conflicts of interest between the North and the South. War is a matter of time.
2。 Because the north is a capitalist industrial and commercial economy, most of their troops are white and local residents (children and old people have them, but on the one hand, their combat effectiveness is not good). Besides, the leadership ability of the army is different. Later, Lincoln introduced a general whose name was forgotten. He was good at fighting, but there were many problems. The south is full of black slaves, one is stronger than the other. All are equipped with new weapons, which are superior in quantity and quality. The north began to lose.
3。 After Lincoln issued two decrees (after all, he is the president with great prestige and personality charm), he announced that as long as slaves don't help the south fight and serve in the northern army for more than one year, they can become free men and be free (you can see that mel gibson's Patriot is about the civil war), and the fighting capacity of the north and the south will be different in a short time ~