in order to prevent Preventing_or_letting this the allied air unk raf and the united states Statement army air forces ( usaaf ) unk ordered Arranging to conduct Action operations against axis air power by day and night in order to prevent Preventing_or_letting their resupply Supply or withdrawal Escaping .

by august 1945 , the allies ' manhattan project had produced Manufacturing two types of atomic bombs , and the 509th composite group Come_together of the united states army air forces ( usaaf ) was equipped Supply with the specialized Education_teaching silverplate version of the boeing b-29 superfortress that could deliver Military_operation them from tinian in the mariana islands .

the american official history of the army air forces in the second world war acknowledged losses had been so great that the usaaf would not return Arriving to the target for four months , `` the fact was that the eighth air force had for the time being lost Earnings_and_losses air superiority over germany '' .

the allies had learned Education_teaching of the completion force 's composition and goals through intelligence gained Getting from decrypting japanese radio signals , and plans were developed Coming_to_be for coordinated attacks Attack on it by submarines and united states army air forces ( usaaf ) aircraft .

more than 88 usaaf aircraft attempted to bomb Attack the completion force on 13 and 14 february , but were unable to do so because of bad weather .

the `` luftwaffe '' fighter force defended Defending the airspace of german-occupied territory against attack Attack , first by raf bomber command Causation and then against the united states army air forces ( usaaf ) .