This revised Sesquicentennial edition of Noah Andre Trudeau's The Last Citadel, which includes updated text, redrawn maps, and new material, is a groundbreaking study of the most extensive military operation of the Civil War-the investment of Petersburg, Virginia.The Petersburg campaign began on June 9, 1864, and ended on April 3, 1865, when Federal troops at last entered the city. It was the longest and most costly siege ever to take place on North American soil, yet it has been overshadowed by other actions that occurred at the same time period, most notably Sherman's famous ""March to the S