UPDATE: According to Cernovich, US boots on the ground wouldn't be for "safe zones" — Trump's National Security Advisor wants "full-scale war".

The Pentagon has drawn up plans for more boots on the ground in Syria by June or sooner, according to independent journalist Mike Cernovich. 

US Special Forces are already operating in northern Syria, and "hundreds" of US marines have been deployed near Raqqa to assist with the assault on ISIS' capital. 

If Cernovich is correct, more boots on the ground would likely mean that Washington will try to enforce "safe zones" in Syria.