327019
March Operation Menu was the codename of a covert United States Strategic Air Command ( SAC ) bombing campaign conducted in eastern Cambodia from 18 March 1969 until 26 May 1970 , during the Vietnam War .
 United States Strategic Air Command, Cambodia, Vietnam
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 United States Strategic Air Command, Cambodia, Vietnam