During the Siege of Petersburg of 1864–65, Hill and his men participated in several battles during the various Union offensives, particularly Jerusalem Plank Road, the Crater, Globe Tavern, Second Reams Station, and Peebles Farm. During the Battle of the Crater, he fought against his West Point classmate Ambrose Burnside, whom the former repulsed at Antietam and Fredericksburg. Hill was ill several times that winter; in March 1865, his health had deteriorated to the point where he had to recuperate in Richmond until April 1, 1865.