What were some key elements in the Nixon Doctrine?

Answer 1

There was no consensus on what were the key elements of the so-called Nixon Doctrine. From the Nixon administration side the doctrine was not a revaluation of military commitments but instead a contraction of the American forces at hand to meet its commitments with regards to the Vietnam War. The result had been increasing the defense budget not cutting it, nor cutting the rate of increase.It has to be noted that Nixon could not do that without the US Congress. The US Military was not being constrained under Nixon, but the change was the organization of a large professional army.

And, the CIA was moving towards using its assets in domestic security.

The latter aspect was dangerous and on paper it never happened.

The building of a professional army might have seen to be dangerous, but not so dangerous to the young men who would be now free of the draft.