June 9,1864 - March 25, 1865
The Battle of Petersburg (aka Siege of Petersburg) was a series of battles around the cities of Richmond and Petersburg, Virginia, fought from June 9, 1864, to March 25, 1865, during the Civil War. Beginning after the unsuccessful attack of the city of Petersburg by Ulysses S. Grant, Grant then construction trenches around the eastern portion of Richmond to the outskirts of Petersburg. The city was a major supply hub to the confederate army led by Robert E. Lee, who finally abandoned the city in 1865 and retreated, which led afterward to his ultimate surrender at Appomattox Court House. The Siege of Petersburg continues to be known as an early example of trench warfare, which would be used extensively in World War I.