Before January 21, 2009, the United States attacks Syria. For this claim to be judged true, U.S. military forces must engage Syrian targets at the direction of the U.S. President.
Some events that would satisfy this claim:
Note that the U.S. President must specifically premeditate and order this operation. An automatic response by U.S. forces to a Syrian action in a single incident would not constitute sufficient conditions for this claim to be judged TRUE.
Some events that would NOT satisfy this claim:
See also: USIraq, USIran, USNKor
I will rely on major news sources to validate this claim. If any major news source(i.e. London Times, New York Times, Wall Street Journal) suggests this is the case, I will judge this claim as true.