There's word that the Europeans and Australia may put sanctions on the Syrian regime. This does not go far enough. You can't just sanctions a few dozen people. The entire country must be sanctioned, which has the additional effect of the entire country suffering. Making the entire country suffer will make the Syrian regime very unpopular and could possibly make them unable to carry out their regular duties. Not only this, but the regime could lose the support of the army as well, which is generally interested in being able maintain the army and buy new equipment. It will not be able to do this under global sanctions. The sanctions should be expanded as far as they can from Argentina to Japan to Poland to South Africa. Russia might go for it and we should try China as well.
Crippling sanctions could make the difference.