This poem is actually an excerpt from Stephen Vincent Benét's Pulitzer Prize-winning epic narrative poem "John Brown's Body," which was published in 1928. Benét mentions all of the generals with whom Robert E. Lee worked closely during his tenure as commander of the Army of Northern Virginia: Thomas J. "Stonewall" Jackson, A.P. Hill, James Longstreet, J.E.B. Stuart, Richard Ewell, and John Bell Hood. Also mentioned. albeit briefly, are Generals Joseph E. Johnston, Fitzhugh Lee, and Jubal Early and Colonel John Pelham.
Many thanks to Chuck Ten Brink of the Civil War Artillery Page for keyboarding this excerpt.
"Army of Northern Virginia"