Re: Just the Allies?
Guess the Axis powers' bombs weren't powerful enough?
The Axis powers never had any proper four engined heavy bombers that reached service in any numbers, and their twin motors were incapable of carrying a large bombload. So a Heinkel 111 carried about two tonnes of bombs internally, compared to a Lancaster's internal load of 6.4 tonnes, a Halifax's 6 tonnes, or about 3.5-5 tonnes for a Liberator. Not to mention that the Axis powers never had anything like the number of bombers as the Allies.
Most US bombers carried much lower loads than the RAF's (mainly) night bombers, and the argument was that the greater accuracy of daylight bombing offset the lower loads. I'm not convinced that the evidence really supports either approach. Both night and day bomber took appalling losses, and the fighter escorts were only really effective when the war had dragged on to the point that the Luftwaffe couldn't put up a strong defensive force.