The King's Troops, Royal Horse Artillery, mounted on Irish Draft horses, celebrate their 60th anniversary in Hyde Park, June 2007 The horses pull a WWI canon used for the gun salutes, during official ceremonies.  ,  ARMY,CEREMONY,CITIES,COSTUME,CROWDS,DOMESTIC HORSE ,EQUUS CABALLUS,EUROPE,FORMATION,GROUPS,HORSES,PEOPLE,RIDING,ROYAL,SOLDIERS,TRADITIONAL,UK, United Kingdom  ,  Kristel Richard