I'm playing as Germany. The Civil War occurred while the US was in a war against Mexico. Since Mexico and the US were roughly equal with soldiers, and suddenly the US had a chunk of their population base go hostile, the US wasn't doing so well in the war. I decided to invade and grab New York while it was distracted. With even more brigades going against them, the US folded one by one to Mexico's demand for Colorado, the CSA's demand for independence, and my demands for New York and Massachusetts. As the US was finishing up the last of war (with me), Russia declared war for Idaho (it colonized Oregon at the beginning of the game
) and won that. Since then, every few years Mexico will grab a western state and the CS will grab an eastern/mid state. During the second round of wars, I joined in and grabbed Pennsylvania and Maryland. Great powers are: Britain, Germany/Russia (rough parity), France, CSA, Mexico, Brazil, USA. USA is currently ranked ninth, and will be replaced as great power by Netherlands rather shortly. The only reason they lasted on the great power list this long is because they keep winning white peaces with Russia and getting prestige. Since this screenshot was taken, a few more states were annexed by Mexico and the CSA.
Elsewhere, things are pretty much normal. I grabbed Egypt at the beginning of the game, I forced Austria to release Hungary and then annexed it (really cheap and easy... I released Hungary in the first war, then just used my free casus belli against Austria to occupy the whole damn country, and sat on it until their industry score was crippled). I got Java from the Netherlands, and part of Algeria from France. A couple concessions in China (fueling my economy). Nothing too exciting.
Edit: Oh yeah! Ironically, the CSA became liberal and freed all of its slaves. Meanwhile, the US is conservative and maintained Arkansas, Missouri, and Oklahoma as slave states (until they were annexed one by one). The only reason the US doesn't have slavery is because emancipation was forced on it by the Confederacy.