The Petersburg Breakthrough Battlefield is a historic district in Dinwiddie County, near Petersburg, Virginia. It was the location of the Third Battle of Petersburg, in which the Union Army broke through Confederate Army lines protecting Petersburg and Richmond on April 2, 1865, during the American Civil War. The success of the breakthrough led to abandonment of Richmond by General Robert E. Lee, a general retreat, and surrender at Appomattox Court House one week later. Portions of the area were listed on the National Register of Historic Places in 2003, and a different portion (overlapping the first) was designated a National Historic Landmark in 2006. Much of the battlefield area is part of Pamplin Historical Park, a private park open to the public that interprets the battle. The park includes a full-service visitor center, trails, displays, interpretive signs and history programs. The Civil War Trust (a division of the American Battlefield Trust) and its partners have acquired and preserved of the Breakthrough battlefield in five transactions since 2004.