This footage shows how military officials deal with trespassers on its land - crushing vehicles with a TANK. The video features a quad bike found being ridden around MoD land being squashed by the massive armoured machine. Operation Aston, in partnership with Wiltshire Council, aims to clamp down on illegal driving in the Salisbury Plain Training Area - a hotbed for off-roaders. The 147 square mile plot in south west England is the largest military training area in the UK.