U.S.A’s Secretaries of defense
| 1) | James V. Forrestal Sep 17, 1947 - Mar 28, 1949 |
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12) | James R. Schlesinger Jul 2, 1973 - Nov 19, 1975 |
| 2) | Louis A. Johnson Mar 28, 1949 - Sep 19, 1950 |
13) | Donald H. Rumsfeld Nov 20, 1975 - Jan 20, 1977 |
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| 3) | George C. Marshall Sep 21, 1950 - Sep 12, 1951 |
14) | Harold Brown Jan 21, 1977 - Jan 20, 1981 |
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| 4) | Robert A. Lovett Sep 17, 1951 - Jan 20, 1953 |
15) | Caspar W. Weinberger Jan 21, 1981 - Nov 23, 1987 |
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| 5) | Charles E. Wilson Jan 28, 1953 - Oct 8, 1957 |
16) | Frank C. Carlucci Nov 23, 1987 - Jan 20, 1989 |
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| 6) | Neil H. McElroy Oct 9, 1957 - Dec 1, 1959 |
17) | Richard B. Cheney Mar 21, 1989 - Jan 20, 1993 |
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| 7) | Thomas S. Gates Dec 2, 1959 - Jan 20, 1961 |
18) | Les Aspin Jan 21, 1993 - Feb 3, 1994 |
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Robert S. McNamara Jan 21, 1961 - Feb 29, 1968 |
19) | William J. Perry Feb 3, 1994 - Jan 23, 1997 |
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| 9) | Clark M. Clifford Mar 1, 1968 - Jan 20, 1969 |
20) | William S. Cohen Jan 24, 1997 - Jan 20, 2001 |
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| 10) |
Melvin R. Laird |
21) | Donald H. Rumsfeld Jan 20, 2001 - Dec 18, 2006 |
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| 11) | Elliot L. Richardson Jan 30, 1973 - May 24, 1973 |
22) | Robert M. Gates Dec 18, 2006 - Present |
admin @ August 3, 2007