On June 15, the first day of the Battle of Petersburg, some 10,000 Union troops under General William F. Smith moved against the Confederate defenders of Petersburg, made up of only a few thousand armed old men and boys commanded by General P.G.T. Beauregard. However, the Confederates had the advantage of formidable physical defenses, and they held off the overly cautious Union assault. The next day, more Federal troops arrived, but Beauregard was reinforced by Lee, and the Confederate line remained unbroken during several Union attacks occurring over the next two days.
By June 18, Grant had nearly 100,000 at his disposal at Petersburg, but the 20,000 Confederate defenders held on as Lee hurried the rest of his Army of Northern Virginia into the entrenchments. Knowing that further attacks would be futile, but satisfied to have bottled up the Army of Northern Virginia, Grant’s army dug trenches and began a prolonged siege of Petersburg.
Finally, on April 2, 1865, with his defense line overextended and his troops starving, Lee’s right flank suffered a major defeat against Union cavalry under General Phillip Sheridan, and Grant ordered a general attack on all fronts. The Army of Northern Virginia retreated under heavy fire; the Confederate government fled Richmond on Lee’s recommendation; and Petersburg, and then Richmond, fell to the Union. Less than a week later, Grant’s massive army headed off the remnants of the Army of Northern Virginia at Appomattox Station, and Lee was forced to surrender, effectively ending the Civil War.
