1Donald Rumsfeld, The National Defense Strategy of the United States of America, Washington, D.C., March 2005, pp. 2-4.
2Frank G. Hoffman, "Conflict in the 21 st Century: The Rise of Hybrid Wars", Potomac Institute for Policy Studies, Arlington, Ya. , December 2007, 13. 7.
3Gates, "' A Balanced Strategy", Foreign Affairs, January/Feb- ruary 2009, p. 2.
