“ISIS has created a new structure that is less centralized, and it will continue, even without al-Baghdadi,” one expert said.

Reaction: Those who suffered under the Islamic State greeted the news of Mr. al-Baghdadi’s death with grim satisfaction at best. “He deserves a worse and more abhorrent death than this one,” said one man in Mosul, Iraq.

Analysis: The nighttime raid that resulted in Mr. al-Baghdadi’s death underscored the importance of three factors: robust alliances, faith in intelligence agencies and the projection of military power around the world — all of which President Trump has derided.

Closer look: See the raid site and learn more about the quick process used to identify Mr. al-Baghdadi’s remains.

Related: A withdrawal by the U.S. military, a Turkish invasion and a newly strengthened Syrian leader have reshaped this week’s peace talks in Geneva, which for the first time in years have brought together the Syrian government and opposition forces.