Although it was not a comprehensive policy statement, the Tillerson speech completed a months-long process in which the Pentagon has succeeded in enlisting the Trump administration to sign on for a semi-permanent US military engagement in three countries with significant US troops contingents: Syria, Iraq and Afghanistan.
This trifecta of semi-permanent US military engagements reflects the extraordinary power of the Pentagon to sway even a president who had made opposition to such policies a central element of his campaign.