V1 Flying Bombs

During World War 2, the first V1 flying bombs were being launched by Germany against London and they were hitting Central London accurately. Germany had no agents in Britain. Not one. They thought they did, but every agent they sent over was caught and then either 'turned' or executed, and the other agents were all fictitious: imaginary ones dreamed up in a British campaign of disinformation that was and is breathtaking in and of itself. The government in the UK didn't want to risk the buildings, architecture, and heritage of the heart of London (quite a lot had been bombed out anyway), so the 'agents' reported back to Berlin that the V1s were overshooting their targets and coming down in North London. Fake stories planted in newspapers reinforced the deception. The Germans dutifully shortened the range, and the V1s bombed South London to ruins. One reason why a lot of Croydon in the 1960s was concrete is because of the damage done by the V1s in 1944.