Foreign Relations of the United States, 1961–1963, American Republics; Cuba 1961–1962; Cuban Missile Crisis and Aftermath, Volumes X/XI/XII, Microfiche Supplement

348. Telegram 6830 from the Joint Chiefs of Staff to Certain Military Commands, October 21¹

October 21, 1962

[illegible in the original] from Taylor.

THIS IS A WARNING MESSAGE.

1. The President of the United States has under consideration the initiation of blockade operations against Cuba.

2. The reaction to these operations by Cuban military forces could lead to U.S. air strikes against Cuban armed forces, and invasion of the island of Cuba. Preparations for these contingencies are in progress. These sub-[illegible in the original] actions, if initiated, would probably result in the [illegible in the original] of force against Soviets military and civilian [illegible in the original] and would directly challenge the prestige of the Soviet Union. The reaction of the USSR cannot be predicted with accuracy.

3. It is imperative under the circumstances which could arise to present the strongest possible deterrent to any [illegible in the original] of Soviet military action. The U.S. must demonstrate unequivocally that it is ready militarily to meet and to defeat retaliatory Soviet actions at whatever level is necessary. At the same time, we must avoid actions in other areas which may be considered provocative or which may create civil alarm.

4. At the time of the public announcement by the President of the United States of the decision to initiate blockade operations DEFCON 3 level of readiness will be effected world-wide. It is expected that the announcement will be made on the evening of 22 October Washington time. The time of initiation of blockade operations will tentatively be 24 to 48 hours later.

5. Should the action taken against Cuba include air attack and invasion of Cuba, reinforcement capabilities for the European and Pacific commands, as reflected in the Joint Strategic Capabilities Plan, applicable for general war, may be delayed.

6. JCS desire all commanders to review applicable plans, and be prepared to report critical limitations to the conduct of general war operations in their respective areas.

7. The contents of this message are sensitive and must be closely held.

1. Possible reactions to initiation of blockade operations against Cuba and instructions to review applicable general war plans. Top Secret. 3 pp. Kennedy Library, NSF, Countries Series, Cuba, Cables, 10/16/62–10/21/62.