One of ISIS’s Leaders Killed

American Special Operations forces mounted a rare raid into eastern Syria early Saturday, killing a leader of the Islamic State and about a dozen militant fighters, as well as capturing his wife and freeing an 18-year old Yazidi woman whom Pentagon officials said had been held as a slave.

In the first successful raid by American ground troops since the military campaign against the Islamic State began last year, two dozen Delta Force commandos entered Syria aboard Black Hawk helicopters and V-22 Ospreys and killed the leader, Abu Sayyaf. One...

The U.S. operation to kill a top ISIS commander on Saturday was a "significant blow" to the terror group, Defense Secretary Ashton Carter said.

The ISIS commander, Abu Sayyaf, was killed after he fought capture in the raid at al-Omar in eastern Syria, Carter said in a statement. His wife, an Iraqi named Umm Sayyaf, was caught and is being held in Iraq.

Carter said he had ordered the special forces raid against the terror group, also known as ISIL, at the direction of President