MAP ACTIVITYMap 15.3 The Civil War, 1863–1865 Ulysses S. Grant’s victory at Vicksburg divided the Confederacy at the Mississippi River. William Tecumseh Sherman’s march from Chattanooga to Savannah divided it again. In northern Virginia, Robert E. Lee fought fiercely, but Grant’s larger, better-supplied armies prevailed.READING THE MAP: Describe the difference between Union and Confederate naval capacities. Were the battles shown on the map fought primarily in Union-controlled or in Confederate-controlled territory? (Look at the land areas on the map.)CONNECTIONS: Did former slaves serve in the Civil War? If so, on which side(s), and what did they do?