Consider the London Blitz of 1940. Initially the Germans targeted British military and industrial bases, particularly the RAF airfields. This put the RAF on the ropes.
Then Hitler ordered a change: bomb British cities to break morale (this was also done as a reprisal for the RAF bombing of a German city, which might have been accidental).
That was huge error on Hitler's part. The Blitz, and the later V1’s and V2’s, did nothing to break British morale. It was a waste of resources, and lives.
The RAF raid on Berlin was intentional. It was ordered the day after a German flight of bombers dropped their bomb loads on a London suburb. That bombing was by accident. The bomber flight got lost is heavy weather, decided to dump their bomb loads and return to base. The did not realize that they bombed a civilian area.
Which has led to the myth that the Germans would have won the Battle of Britain if they had just continued their original plan. Actually not true, as the evidence shows the Germans still would have lost, the RAF still not shattered, but its a myth still to this day widely believed.