It doubles the United States.
While the Continental Army lose the Battle of Bunker Hill, they still gained a tremendous confidence boost. Because of this, the Continental Army was able to win the next battle, the Battle of Gloucester.
Lincoln declared that they would have to accept the amendments and the new government, disband their old confederate government, make sure that former office holders could never go back into politics, and ask for an official pardon from the President of the United States. They also had to free the slaves.