In the 1862 Peninsula Campaign, Union forces commanded by Maj. Gen. George B. McClellan attempted to move northwesterly up the Peninsula from Fort Monroe and capture the Confederate capital of Richmond by circumventing the Confederate States Army in northern Virginia. Greatly outnumbered forces on the Peninsula initially under Major General John Bankhead Magruder delayed the advance through tactics which included elaborate ruses and physical barriers such as the Warwick Line (anchored by Mulberry Island and Yorktown), and the much less substantial Williamsburg Line. During the Battle of Williamsburg on May 5, 1862, nearly 41,000 Federals and 32,000 Confederates were engaged. Confederate casualties, including the cavalry skirmishing on May 4, were 1,682. Union casualties were 2,283. The area along the Quarterpath Road saw fierce fighting. Several of the redoubts still exist there, and have been preserved, as has a small portion of Fort Magruder along Penniman Road.