Papers of the U.S. Army officer. Collection consists of correspondence (1928-1967); articles and speeches on military subjects (1934-1967); photographs (1937-1965); and memorabilia (1917-1966), including address books. Notable correspondents include Creighton W. Abrams, Hanson Baldwin, Alan Bible, Howard W. Cannon, Bruce C. Clarke, James B. Conant, Bing Crosby, William O. Douglas, Dwight D. Eisenhower, Leopold Figl, J. William Fulbright, Lyndon B. Johnson, Robert F. Kennedy, Curtis E. LeMay, Basil Henry Liddell Hart, John L. McClellan, Frank Pace, George S. Patton, Francis T.P. Plimpton, Syngman Rhee, Eddie Rickenbacker, L. Mendel Rivers, Karl F. Rolvaag, Eleanor Roosevelt, DeWitt C. Smith, Robert A. Taft, Maxwell D. Taylor, James A. Van Fleet, William C. Westmoreland, Stephen M. Young, and others.

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.