Bombers achieved results only in proportion to the weight of explosives they could drop accurately on designated targets; mass was critical. The Luftwaffe and the Japanese air forces had formidable capabilities for supporting their respective ground forces and navies, as well as for killing refugees and promoting terror, but their aircraft carried small bombloads. The Luftwaffe inflicted pain and destruction during the 1940–41 blitz on Britain, but nowhere near sufficient to make a decisive impact on the ability of Churchill’s nation to continue the war.