The Weinberger Doctrine is a set of criteria established by U.S. Secretary of Defense Caspar Weinberger in 1984, which outlines when the United States should commit troops to military engagements. The doctrine emphasizes that military force should only be used when:
The engagement is vital to national interests or those of allies.
There is a clear intention and understanding of the objectives.
The use of force is a last resort after all other options have been exhausted.
There is a reasonable assurance of public and congressional support.
The force used must be sufficient to achieve the objectives.
There is a clear exit strategy to avoid prolonged military involvement.
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The doctrine was articulated in a speech titled "The Uses of Military Power" and has influenced U.S. military policy since its introduction.