Monday, May 4, 1863
Sensing no imminent Confederate threat, the Federals abandoned their position at Marye’s Heights. However, Confederate forces led by General John B. Gordon and General William Barksdale took control of Marye's Heights. General John Gibbon's division was once again under fire, and the Twentieth Massachusetts was ordered to defend and protect the Union line between Hazel Run and the railroad in Fredericksburg. There would be no reinforcements from General John Sedgwick, as his forces were marching along the Orange Plank Road to Chancellorsville. During the night the Twentieth Massachusetts exchanged bullets with the Confederates but held their portion of the line.1
1Richard F. Miller, Harvard's Civil War: A History of the Twentieth Massachusetts Volunteer Infantry (Lebanon, New Hampshire: University Press of New England, 2005), 238-40.