From a presidential memoir:
Rule 1: The United States should not commit its forces to military actions overseas unless the cause is vital to our national interest.
Rule 2: If the decision is made to commit our forces to combat abroad, it must be done with the clear intent and support to win. It should not be a halfway or tentative commitment, and there must be clearly defined and realistic objectives.
Rule 3: Before we commit our troops to combat, there must be reasonable assurance that the cause we are fighting for and the actions we take will have the support of the American people and Congress. (We felt that the Vietnam War had turned into such a tragedy because military action had been undertaken without sufficient assurances that the American people were behind it.)
Rule 4: Even after all these other tests are met, our troops should be committed to combat only as a last resort, when no other choice is available.
Any guesses? (Hint: he learned the hard way.) Are any of the conditions met in this case?