What was the basic thrust of the Nixon Doctrine? What were its implications in Chile?

US can not bear the sole responsibility of the political and financial responsibility for defense of allies and friends. This resulted in a search for new solutions to prevent war and spred of communism by limiting armaments, contracting, joint programs and systems. It was a period of relaxation (detente) in Chile it implicated the action which was supported by CIA not by military when CIA supported the coup to overthrown the marxist president Allende