First we would probably have to cut a deal with Assad.. Next we would have to send troops into Syria as in marines and army infantry to crush them. We are far better trained and far better equipped than they are so it would not be all that difficult militarily.. The one thing you have to consider is A. How much it will cost militarily and B.
How many American lives will be lost in the fighting.. I can already tell you it will be nothing compared to what ISIS will suffer but we could loose maybe 500 troops killed or wounded and with ISIS ten times as many in Syria killed or wounded probably enough to take the Syria ISIS capital and the surrounding area.
I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.