WATERLOO, BELGIUM - JUNE 18:  Historical re-enactors on horseback take part in a practice drill in the Allied Bivouac camp on June 18, 2015 in Waterloo, Belgium. Around 5000 historical re-enactors from around the world will take part in three days of events from June 18, 2015 to mark the 200th anniversary of the Battle of Waterloo. The 1815 battle saw the overthrow of Napoleon Bonaparte and the restoration of Louis XVIII to the French throne.  (Photo by Dan Kitwood/Getty Images)