The 
Eisenhower Doctrine, given in a message to 
Congress on 
January 5, 
1957 stated the 
United States would use armed forces upon request in response to imminent or actual aggression from Communist forces in the 
Middle East.  The Doctrine was applied in 
Lebanon that year, justifying  American intervention.
External Links:
-  [[1] (http://www.us-israel.org/jsource/US-Israel/ikedoc)]
 
 
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