Could U.S. intervention in Syria spark a much wider conflict?

[cali]

The region is at a particularly unstable moment. It seems unlikely that U.S. intervention would go over well with the citizens and governments of several countries.

According to a Brookings piece these are the option for U.S. intervention:




Training and equipping the opposition.
Stopping the resupply of the regime in order to diminish its ability to generate firepower.
Attacking regime infrastructure targets, such as military bases, power-generation plants and transportation choke points like bridges.
Establishing and maintaining a no-fly zone.
Engaging in a tactical air campaign against regime ground forces.

http://www.brookings.edu/research/papers/2013/08/09-military-syria-civil-war-us-intervention-pollack

Would Iran get more involved? what about Russia? Could intervention provoke an attack on Israel by H'zbollah?

[Supersedeas]

2. those are the real questions

I am confident that this administration will pursue each of these questions with vigor; where the prior administration didn't give a damn about what they broke in the Pottery Barn shop.