thumb|left| The first day of success was greeted in Britain by the ringing of church bells. The massed use of tanks, despite being a further increase on previous deployments, was not entirely new but the success of the attack and the resulting Allied press enthusiasm, including in the United States, were unprecedented. The particular effectiveness of the tanks at Cambrai was the initial passage through barbed wire defences, which had been previously "supposed by the Germans to be impregnable".
thumb|left| The first day of success was greeted in Britain by the ringing of church bells. The massed use of tanks, despite being a further increase on previous deployments, was not entirely new but the success of the attack and the resulting Allied press enthusiasm, including in the United States, were unprecedented The particular effectiveness of the tanks at Cambrai was the initial passage through barbed wire defences, which had been previously "supposed by the Germans to be impregnable".