The two battles that proved to be the undoing of Lee's attempt to protect Richmond in the latter days of the Civil War were -
1. The battle of Fort Stedman on 25th March 1865. It was the last attempt to break through the Federal Lines east of Peters-burg.
2. The battle of Five Forks on 1st April 1865. It was fought in southwest of Peters-burg around the road junction of Five Forks near the conclusion of the American Civil War.