“We can’t keep assuming there is now an established order,” says Sergio Aguayo, a Mexican political analyst. “There will likely be more turbulence to come.”

In capitals around the world, foreign leaders are trying to figure out exactly what the administration’s foreign policy positions are and how to best engage with a president who has embraced being unpredictable.

Of the many things President Trump was expected to do in his first 100 days, launching an attack on Syria’s military certainly wasn’t one of them. Throughout his campaign, Trump praised Syrian President Bashar al-Assad for “killing ISIS,” but also vowed to keep the United States out of the Syrian civil war.

So when Trump ordered missile strikes at a Syrian air base on April 7 in response to an alleged chemical weapons attack by the Syrian government just days earlier, he took many in the region, and the world, by surprise.

Some of Assad’s regional rivals, including leaders in Turkey and Saudi Arabia, welcomed the U.S. assault as long overdue.