We do this in order to slow down aggression. We do this to increase the confidence of the brave people of South Vietnam who have bravely born this brutal battle for so many years with so many casualties. And we do this to convince the leaders of North Vietnam-and all who seek to share their conquest-of a simple fact: We will not be defeated. We will not grow tired. We will not withdraw either openly or under the cloak of a meaningless agreement.

Lyndon B. Johnson: Containing the Public Messages, Speeches, and Statements of the President (ed. 1965)