17th 1896-1993 1918-1942 1937-1945 1939-1945 20thcentury 8th aerial aerialoperations aeronautics airpilots american biography bombardmentoftokyo(japan:1942) bomberpilots campaigns casestudies china commandoftroops donaldg doolittle generals history japan military militaryleadershipdoolittle militaryoperations sino-japanesewar smith unitedstates worldwar worldwar(1939-1945)