The War of Succession
After the decisive Confederate victory, Lee and the Army of Northern Virginia move northward to occupy Philadelphia. As a direct result, the Confederate States of America earn diplomatic recognition from the UK and France. Both European nations then force mediation on the United States this action results in full independence for the Confederate States. In less than two years, the War of Secession had ended.
While considering the mediation offer, president John Bell mentioned to the British ambassador Richard Lyons that he had in his desk drawer a proclamation that would have freed slaves in the rebellious Confederacy. Bell than discussed the proclamation's viability with his cabinet, but after the U.S. defeat at Gettysburg, he decided against issuing it. He was warned by Lyons that if the proclamation were issued, he would have been perceived as acting in desperation, since the U.S. was about to officially concede defeat and that issuing such an order would amount to nothing more than an attempt to raise insurrection inside what was now another country, and doing so would be seen as a directly hostile act.
The Post War Years of the United States
Shortly after the conclusion of Gettysburg, Confederate general Braxton Bragg completes the conquest of Kentucky sometime after the U.S. agreed to mediation, Kentucky becomes the twelfth state to enter the Confederacy. In addition, the pro-Confederate Five Civilized Tribes of the Indian Territory are given territory of their own in the C.S., later to become the State of Oklahoma. The Caribbean island of Cuba is subsequently purchased by the Confederate States from Spain in 1873,and after it's division into East and West Cuba becomes the 14th and 15th Confederate States.
Bell is defeated in the 1864 elections by Abraham Lincoln, and another Constitutional Unionist is never reelected. The Republicans also become the majority in Congress, but in 1880 voters, tired of the Republicans' "same old same old line" against the Confederate States, opt to return the Democrats to the majority.
In the Presidential election of 1880, Democrat Samuel Tilden defeats the incumbent Republican Rutherford Hayes. Tilden runs on a "healthier America" platform.