How about this?
British keep Cuba. America gets rich but are taxes are increased as a result. American revolution is earlier. Cuba is given to America. Spain gives Florida. French revolution earlier. America is stronger and takes Canada in War of 1812 [different year in this timeline however]. Civil war earlier. South win because of Cuba and America also has to fight off Canadian uprisings. Lincoln is forced out of office. Russia sell Alaska to the South. Europe forces South to give up slavery. Many black people head to North, Alaska, or go to Europe. There is a lot violence. against black people. So much so that this time is called The Black Times [although this term is seen as racist in today's time in this timeline]. The South support Canadian Independence and keep supplies to guerrilla groups. This angers America and another war starts. The South win and Canada is independent, they are given Alaska and North West America, and ex Mexican territory is given to the South.The South fight Spain over Purto Rico and gain all Spainish empire. World War One starts. The South enter early on the side of the allies. America joins Germany. The allies win in America but a stalemate in Europe.Germany helps the white army beat the red army but force a system of governing like Britain with a monarch and a parliament, Germany changes to this but have a Military Parliament instead as a upper house. A demilitarized zone is set up between France and Germany. America aswell. This does not last long and France and Germany fight. The South and Britain does not want a war. France loses and Germany gains many French. Britain and The South decide to make friends with Germany and even blame World War One on France and say that they should of been on Germany side. Austria Hungary falls due to disagreement on a new governing style. Ottoman empire falls and many ethnic countries are created like Kurdistan. Japan fights China. Germany, Britain, the South, and Japan make a agreement not to fight. France does not and fights Japan losing the remaining empire in Asia. Spain and Italy are still fascist. This inspires France and many French racist party get into power but no party takes over the country. Mussolini still falls without a war. Spain are the same. Japan invades Russia due to China signing peace treaty with no more land to take.