Announces "full" Syria withdrawal over objections of military and allies

Trump abruptly announced a "full" and "rapid" withdrawal of all 2,000 U.S. troops from Syria via Twitter, overruling his own senior military advisors, Defense Secretary Mattis, and allied commanders who warned the decision would abandon Kurdish allies and benefit Russia, Iran, and ISIS. The announcement came without consultation with the Pentagon, State Department, or international partners. Military officials were blindsided by the decision, which contradicted the administration's own stated Syria policy and came just weeks after officials testified that troops would remain. The move was widely seen as a gift to Vladimir Putin and triggered the resignation of Defense Secretary Mattis the following day. Trump claimed "We have defeated ISIS in Syria," a statement immediately contradicted by his own military and intelligence officials who said ISIS remained a significant threat.

"We have defeated ISIS in Syria, my only reason for being there during the Trump Presidency." — December 19, 2018 tweet announcing Syria withdrawal, contradicting military assessments