MUNICH, Germany (Reuters) - Acting U.S. Defense Secretary Patrick Shanahan said on Friday the United States was committed to defeating Islamic State in the Middle East and beyond, but officials said European allies were skeptical of Washington’s pledges.

U.S. Secretary of Defense Patrick Shanahan speaks at the annual Munich Security Conference in Munich, Germany February 15, 2019. REUTERS/Andreas Gebert

U.S. President Donald Trump’s announcement in December that he was withdrawing all 2,000 U.S. troops from Syria surprised and rattled allies. U.S. officials have crisscrossed the Middle East in recent weeks to reassure them that Washington remains committed to the region.

Trump’s Syria decision was opposed by top aides, including then-Defense Secretary Jim Mattis, who quit, leaving his deputy Shanahan in charge of the Pentagon.

“While the time for U.S. troops on the ground in northeast Syria winds down, the United States remains committed to our coalition’s cause, the permanent defeat of ISIS, both in the Middle East and beyond,” Shanahan said after a meeting on the sidelines of the Munich Security Conference.

The meeting included about a dozen defense ministers from the coalition to defeat Islamic State. Kurdish-led fighters are battling to capture the militants’ last major stronghold in Syria, but even without territory, the group is widely seen as a continuing threat.

Shanahan said he envisioned a “bigger and stronger” coalition to fight Islamic State globally. “We will continue to support our local partners’ ability to stand up to the remnants of ISIS,” he added, using an acronym for Islamic State.

However, European officials said they were given few details during the closed-door meeting in Munich and many questions remain. “We are still trying to understand how the Americans plan to withdraw,” said one European official, speaking on condition of anonymity.

Another official said Shanahan did not provide allies with a timeline of the U.S. withdrawal from Syria and allies expressed scepticism during the meeting.

A senior U.S. defense official said no commitments were made during the meeting and there was little discussion about timelines. “These meetings don’t tend to have specific deliverables or decisions,” the U.S. official said.

Trump on Friday, though, indicated that he would have solid progress to share very soon.

“We have a lot of great announcements having to do with Syria and our success with the eradication of the caliphate and that will be announced over the next 24 hours,” he said during a Rose Garden event at the White House.

SYRIA SAFE ZONE

Turkey wants to set up a safe zone with logistical support from allies and says it should be cleared of the U.S.-backed Kurdish YPG militia, which Ankara considers a terrorist group.

The U.S. official said the ministers talked about the need for some sort of security arrangement in northeast Syria after the United States has left.

Republican Senator Lindsey Graham, speaking at the Munich Security Conference, said the top U.S. general would ask allies to contribute forces to help stabilize areas liberated from Islamic State.

France expressed scepticism at the suggestion.

“Once the Americans leave we’ll be forced to leave. We aren’t going to be the patsy for the Americans,” a senior French diplomat said, adding he did not see others ready to fill the void.

French Foreign Minister Jean-Yves Le Drian told lawmakers on Wednesday he had doubts about a safe zone. “Who will watch it? Who will be its guarantors? What would be its perimeters?”