 Complete the following phrase:  General Robert E. Lee ordered his Confederate divisions of the Army of Northern Virginia, under the field command of Major Generals Benjamin Huger, James Longstreet, and A.P. Hill, to converge upon Union Major General George B. McClellans retreating Army of the Potomac in transit in the vicinity of Glendale or Fraysers Farm, attempting to catch it in the flank and destroy it in detail. The Army of the Potomac was moving out of the White Oak Swamp on a retreat from the Chickahominy River to the James River following the perceived defeat at the 