The UK Independent in its article, “US marines sent to Syria to help assault on Isis’ Raqqa stronghold,” would report that:
"Hundreds of US marines have arrived in Syria armed with heavy artillery in preparation for an assault on Isis’ de-facto capital of Raqqa."
However, the presence of US troops in Syria is entirely unsolicited by
the Syrian government and constitutes a clear violation of Syria’s
national sovereignty under international law.