question: In the 1920 's and 30 's to theorist thought wars could be won by air forces what were their names ?
answer: Giulio Douhet and Billy Mitchell
turker_answer: In the 1920 's and 30 's Giulio Douhet and Billy Mitchell thought wars could be won by air forces .
rule-based: In the 1920 's and 30 's to theorist thought wars could be won by air forces Giulio Douhet and Billy Mitchell were their names .