Special “Battle in the Saddle” Event to Support Caisson Platoon Equine Assisted Program at Ft.Belvoir   Washington, D.C. (June 26, 2013) –  Great Meadow Polo Club is set to host the 19 th annual Military Appreciation Night on June 29 in The Plains, Va., benefitting the Caisson Platoon Equine Assisted Program at Ft.