The Battle of Jerusalem Plank Road, also known as the First Battle of the Weldon Railroad, was fought June 21–23, 1864, near Petersburg, Virginia. It was the first of a series of battles during the Siege of Petersburg aimed at extending the Union siege lines to the west and cutting the rail lines supplying Petersburg. Two infantry corps of the Union Army of the Potomac attempted to sever the railroad, but were attacked and driven off by the Confederate Army of Northern Virginia's Third Corps, principally the division of Brig. Gen. William Mahone. The inconclusive battle left the Weldon Railroad temporarily in Confederate hands, but the Union Army began to extend its fortifications to the west, starting to increase the pressure of the siege.