Franklin D. Roosevelt implemented a strategy.
Franklin D. Roosevelt . He was in office from 1929 to 1933 and served as a reform governor , promoting the enactment of programs to combat the depression besetting the United States at the time . He created numerous programs to support the unemployed and farmers , and to encourage labor union growth while more closely regulating business and high finance . As an active military leader , Roosevelt implemented a war strategy on two fronts that ended in the defeat of the Axis Powers , and he initiated the development of the world 's first atomic bomb .