Supply depot yard in England with rows of US Army vehicles for preparations for D-Day

Operator in switch engine looking back as it moves backwards and flat car with huge crate comes into view / crane operator moving crate / two cranes maneuvering crate / side of crate being pulled down to ground revealing US Army tank inside, four soldiers standing on top / depot yard with crane lowering probably top turret plate for tank / two soldiers working on DUKWs lined up in yard / long line of trucks / trucks lined up, soldier looking at clipboard / line of ambulances with Red Cross markings / two soldiers by vehicle, one checking on clipboard / WS rows of vehicles / pan of endless rows of vehicles / yard with rows of vehicles / row of tanks, one moving forward and soldier motioning, soldiers on tanks / row of tanks in front, other vehicles in back, some covered with tarps / row of tanks in fg, countryside in bg / looking down long row of artillery pieces, their gun barrels crossed making wide V / artillery with tarps covering barrels / artillery / MS artillery / soldiers working on artillery / Note: exact day not known