The crest of the coat of arms of the 5th Air Defense Artillery Regiment (formerly the 5th U.S. Artillery), depicting hands grasping a wheel with a gun superimposed on it, commemorates the service of Battery C and Battery I, combined under Lt. Richard Metcalf at Spotsylvania, 4–24 May 1864. The battery "charged earthworks firing its guns and then ran them up by hand to a new position, to the Bloody Angle, and fired repeatedly. This is purported to be the only recorded instance in the Civil War of a battery charging on breastworks."