Assume in the 1920s & 30s the idea of 'stratigic' aviation/bombers is squelched. The primary doctrine in one of "Strike", that is focusing on the enemy military forces, including deep strike to interdict logisitcs lines, forwaard airfields, major HQ, supply depots, as well as against the forward combat forces. Designs for long range heavy bombers are not solicited by the US Army Air Corps. Fast twin & single engined bombers are sought, & tactical close support doctrine is given attention, to the point where the dive bomber development of the 1920s is continued to the latter 1930s.
How does this affect Overall US Army doctrine & practice when mobilization starts in 1940. I expect this will effect strategy to some extent as well.