Late in 2018, President Donald Trump announced that he was ready to withdraw troops from Syria after a long and successful campaign taking back territory from ISIS. The move, decried by national security experts as premature, was said to have provoked then-Defense Secretary James Mattis to resign days later, and now, the Defense Department has reported the results.

Since about half of 2,000 special operations and other train-advise-assist forces returned to the U.S. in the spring, ISIS has been staging a comeback, according to an inspector general report from DoD, the State Department and U.S. Agency for International Development released Tuesday.

“This quarter, ISIS continued is transition from a territory ― holding force to an insurgency in Syria, and it intensified its insurgency in Iraq," Pentagon Principal Deputy Inspector General Glenn Fine, who has been filling in as DoD IG, wrote in a memo topping off the report.

Read more: Army Times