“It was a joint war, but they left us in the middle of the road,” said Gen. Mazlum Kobane, who is in charge of the coalition of militias known as the Syrian Democratic Forces.

The general added that 6,500 of his fighters had been killed while taking on IS.

U.S. troops and Kurdish-led fighters were "brothers in arms" as partners on the ground in the war against IS in Syria, he added.

But Trump’s announcement that he was withdrawing all U.S. troops from the country immediately has left the Kurds feeling abandoned. The president tweeted on Dec. 19 that the U.S. had “defeated IS in Syria,” adding that was the “only reason” to have troops on the ground there.

On Wednesday, IS claimed responsibility for a suicide attack in Manbij that killed 19, including four Americans.

Kobane highlighted that Trump's decision, which was widely seen as the abandonment of a loyal ally, was made against the advice of some U.S. commanders, NBC News reported.

“They are embarrassed,” Kobane said, referring to his American counterparts. “They didn’t expect this decision. It’s out of their hands, and they are constantly apologizing for it.”

The Kurds now fear an attack by NATO member Turkey, which views Kurdish separatism as a paramount security threat.

Administration officials have this month suggested the Syria drawdown will happen more slowly than Trump initially suggested. On Jan. 6, national security adviser John Bolton said that American troops would not depart northeastern Syria until Turkey pledges not to target the Kurdish fighters.

Kobane said the Kurds still see the pending U.S. pullout as “an insult, a breach of credibility and a broken promise.”

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