For one thing, it would be impossible to do so under the auspices of the United Nations, owing to Russian and Chinese obstructionism in the Security Council. There is also America’s understandable reluctance to become involved in yet another war in an Islamic country, as well as the impossibility of knowing what kind of regime might emerge if and when Assad is overthrown.
有很多理由不进行军事干预。一方面，由于俄罗斯和中国在安理会中作梗，不可能在联合国的批准下采取军事干预。此外，美国也有可以理解的难处不愿卷入另一场对伊斯兰国家的战争 。第三，没人知道巴沙尔被推翻后叙利亚会冒出怎样一个新政权。