Regarding erasing Robert E. Lee's exploits in particular, that might prove difficult in the officer corps of our own armed forces.  Lee's victory at the Battle of Chancellorsville in April-May 1863 is still regarded as a signature example of dividing a smaller army to successfully engage a much larger enemy force.  Chancellorsville is considered of comparable historical significance in the history of the force of arms to Alexander's victory at Gaugamela.  Twenty-first century Americans might find much to fault with either commander, but there's no way anyone can whitewash military success from textbooks at West Point or VMI.

And speaking of VMI (or the nearby Washington and Lee University), perhaps either school would appreciate the donation of the statue of Robert E. Lee.  I can think of few more appropriate places for it to reside.  (There remains a statue of Thomas "Stonewall" Jackson in New Orleans (in Metairie).  Historical circumstance keeps it unmolested - for now that is.)