Welcome to THE MAKING OF A NATION -- American history in VOA Special English.In eighteen sixty-four, the battle at Cold Harbor in Virginia ended a month of fighting by the Union Army of the Potomac.The campaign had brought the army almost to the edge of Richmond, the Confederate capital.But General Ulysses Grant had paid a terrible price: more than fifty thousand Union dead and wounded. Confederate losses were much lighter -- about twenty thousand.Grant was beginning to learn an important lesson of the war. The methods of defense had improved much more than the methods of attack.This week in our series, Harry Monroe and Kay Gallant continue the story of the American Civil War.By the autumn of eighteen sixty-four, it appeared that the North would defeat the South in the American Civil War.The southern army needed men and supplies. There was little hope of getting enough of either to win.The northern army was stronger and better-equipped. But it, too, had suffered. Much of the death and destruction was the result of new military technology.