Just arm the US military and let them do their jobs….
Check it out:

President Obama is not asking Congress for authorization to send the U.S. military into Syria and Iraq, but he is asking for money ($500 million) to train and equip the so-called moderate Syrian rebels.

On Thursday, Sen. Harry Reid (D-Nev.) said he expects the House to send over that funding legislation (either stand-alone or part of a continuing resolution), so Congress can pass it “before the end of next week.”