January 2019 Manbij Bombing
An ISIS suicide bomber killed four Americans—two soldiers, a Defense Department civilian, and a contractor—plus 15 others in Manbij, Syria. The attack came weeks after Trump announced withdrawal of all U.S. forces, demonstrating ISIS's enduring capability despite losing most territorial control. It was the deadliest attack on U.S. forces in Syria since operations began.
Trump delayed but didn't cancel the withdrawal; forces drew down from 2,500 to 900.
ISIS lost its final territory two months later but proved it could strike even in defeat.
The Palmyra attack mirrors Manbij's timing—Americans killed during political transition—and validates fears that reduced presence invites ISIS resurgence.
