Ugyanúgy, ahogy iráni, orosz és líbiai katonai erő volt jelen a szíriai hadszintéren: https://en.wikipedia.org/wiki/Syrian_civil_war
"The U.S.-led international coalition, established in 2014 with the declared purpose of countering ISIL, has conducted airstrikes primarily against ISIL as well as some against government and pro-government targets. They have also deployed special forces and artillery units to engage ISIL on the ground. Since 2015, the U.S. has supported the Autonomous Administration of North and East Syria and its armed wing, the Syrian Democratic Forces (SDF), materially, financially, and logistically."
Hát így.