A Cross of lron provides the fullest account yet of the national security state that emerged in the first decade of the Cold War. Michael J. Hogan traces the process of state?making through struggles to unify the armed forces, harness science to military purposes, mobilize military manpower, control the defense budget, and distribute the cost of defense across the economy. President Harry S. Truman and his successor were in the middle of a fundamental contest over the nations political identity and postwar purpose.