The Royal Marching Bands of Orp le Grand . Commemorative ceremonies on 14 and 15 May 2005 for the 65th anniversary of the fighting Cavalry Corps in 1940 . The Battle of Hannut was a Second World War battle fought during the Battle of Belgium which took place between 12 and 14 May 1940 at Hannut . It opposed the Cavalry Corps (2nd and 3rd light mechanized divisions) controlled by the French General Prioux to 16th Panzer Corps of General Hoepner . It was the largest ever tank battle at the time . Municipality of Orp Jauche . Belgium .