June 9, 1864 - March 25, 1865
Only Lee's Army of Northern Virginia remained as a substantial military force to oppose the Union Army. For nine months, Grant and Lee had faced each other from 53 miles of trenches during the Siege of Petersburg. Lee's forces had been reduced to 50,000, while Grant's had grown to over 120,000. The Southern troops began to melt away as the end became clear. On April 2, Grant ordered an attack on Petersburg and broke the Confederate line. Lee and his shrinking army were able to escape.