One hundred years ago today, the First Battle of Cambrai commenced, the first British Army combined arms attack of WW1 and one in which huge numbers of tanks were deployed to crush the Germans’ barbed-wire defences. Quite naturally, the Royal Tank Regiment claims credit for this battle, but few people recognise that the Royal Navy can claim credit for coming up with the concept for the tank and armoured car. In the first month after the start of WW1, the Royal Naval Air Serv