http://www.ang.af.mil/history/Forging.asp<snip>Vietnam revealed a negative aspect of relying on reservists. For largely domestic political reasons, President Johnson chose not to mobilize most of the nation's reserve forces. The 1968 callups were only token affairs. Johnson's decision to avoid a major reserve mobilization was opposed by the senior leadership of both the active duty military establishment and the reserve forces, but to no avail. The Reserves and the Guard acquired reputations as draft havens for relatively affluent young white men. Military leaders questioned the wisdom of depending on reserve forces that might not be available except in dire emergencies.
Race had emerged as another major issue with flowering of the American civil rights movement in the 1950s and 1960s. For over a decade after the active duty military establishment had begun to integrate its ranks during the Korean War, the National Guard had remained an almost exclusively white organization. Discrimination varied, but ten states with large black populations and understaffed Guard units still had no black Guardsmen in their ranks as late as 1961. Secretary of Defense McNamara had tried to encourage voluntary integration in the early 1960s, with little success. The NGB had disputed his legal authority to force integration while the Guard was under state control. It had also argued that integration would be political suicide for some governors and would hurt the military capabilities of their units.
The Civil Rights Act of 1964, which prohibited the use of federal funds to support discriminatory activities, dramatically altered the attitude of the Defense Department toward racial discrimination in the National Guard. It gave federal officials the power to force integration regardless of who controlled the Guard in peacetime. But, real progress in effectively integrating the Guard did not come until the 1970s.