Two days that proved to be a turning point in the American Civil War. July 3, 1863 the Union victory at Gettysburg and the next day July 4, 1863 the siege at Vicksburg ends with Confederate General John Pemberton surrendering to Union General U.S. Grant. This victory would give the Union control of the Mississippi River-splitting the Confederacy in half.
Pemberton surrendered on the 4th because he thought he would be able to get more favorable terms on that day. Vicksburg wouldn’t celebrate Independence Day for another eighty years.