I've already made two extensive replies to your statement Lightning, but they 'went west' and failed to get posted [!??] - The thrust of it though, is that both Air Forces didn't start getting it right until post-D-Day...'later in the War'... The Americans 'Strategic Bombing' was never proved successful, and only improved once Mustangs achieved Air Superiority. The RAF night bombing was accurate, H2S allowed them to bomb through cloud at night, which B-17's couldn't do during the day from height...The Germans bombed cities, so the RAF replied in kind - The bombing of Japan by B-29's used RAF technique, at night, after their gross losses forced them to, using not only incendiaries, but also napalm ! - the B-17 wasn't a very successful bomber, but it was a great morale-booster for recruitment earlier in the War, having first flown in 1937 - It's successive models became heavier slower, thinking to out-gun their way to targets. The Lancaster was a thoroughbred Bomber for night-attack, and accurate as Tallboys etc. testified; Even joining 4000lb blast-bombs together to 12,000lb could be seen as accurate in light of Target-Marking effectively...