He was convinced that a force of anti-shipping airplanes could defend a coastline with more economy than a combination of coastal guns and naval vessels .
Mitchell was concerned that the building of dreadnoughts was taking precious defense dollars away from military aviation .
Mitchell was convinced that a force of anti-shipping airplanes could defend a coastline with more economy than a combination of coastal guns and naval vessels .
Mitchell was concerned that the building of dreadnoughts was taking precious defense dollars away from military aviation .