I believe that we have learned the importance of maintaining military strength as a means of preventing war. We have found that a sound military system is necessary in time of peace if we are to remain at peace. Aggressors in the past, relying on our apparent lack of military force, have unwisely precipitated war. Although they have been led to destruction by their misconception of our strength, we have paid a terrible price for our unpreparedness.

Special Message to the Congress on the Threat to the Freedom of Europe (1948)