Papers of the American army officer, architect, author, founding member of the American Legion. Correspondence, diaries, speeches, training manuals, published materials by and about Wood, military records, reports, maps, and photographs pertaining mostly to Wood's military service. Also, correspondence and research material relating to Leonard Wood.

Papers of the U.S. Air Force officer. Collection includes correspondence (1938-1959); flight records (1937-1951); photographs; pilot's books; scrapbooks (1919-1959), and clippings.

Papers of the American military officer. Powers was Assistant Chief of Operations, U.S. Strategic Air Forces, 1945; Assistant Task Force Commander for Air Operation Crossroads, Bikini Atoll, 1946; Vice-Commander of the Strategic Air Command, 1948-1954; Commander of the Air Research and Development Command, 1954-1957; and Commander-in-Chief of the Strategic Air Command, 1957-1964. Collection includes communications and writings (1945-1970), correspondence (1945-1970), memorabilia (1934-1970), and organizational records (1928-1969), mostly pertaining to the American Security Council. Notable correspondents include William F. Buckley, Lucius D. Clay, Carl T. Curtis, Donald W. Douglas, Ira Eaker, Joe Foss, Arthur Godfrey, Barry Goldwater, Roman L. Hruska, William R. Kintner, Curtis LeMay, Lyman L. Lemnitzer, Robert S. McNamara, Richard M. Nixon, Ronald Reagan, Francis Spellman, Lawrence Spivak, Stuart Symington, Lowell Thomas, Harry S. Truman, Nathan Twining, DeWitt Wallace, and Thomas D. White, among others.