Siege of Petersburg: The Siege of Petersburg was a nine-month operation in 1864-1865 where Union forces under Ulysses S. Grant surrounded and eventually captured the city of Petersburg, cutting off vital Confederate supply lines and leading to the surrender of the Confederate capital of Richmond.
Appomattox Court House: Appomattox Court House was the site where Confederate General Robert E. Lee surrendered the Army of Northern Virginia to Union General Ulysses S. Grant, effectively ending the American Civil War in April 1865.
Battle of the Crater: The Battle of the Crater was a major engagement during the Siege of Petersburg, where Union forces detonated an explosive-filled mine under Confederate lines, but were ultimately repelled in the ensuing attack.