Syrian rebels who drove Islamic State from the town of al-Bab in northwest Syria this year discovered an extensive network of tunnels dug by militants as part of their defenses, a tactic that has slowed the military campaign against them. "The tunnels complicated the fighting a lot and...

The northern Syrian city of Raqqa is expected to join a decentralized system of government being set up by Syrian Kurdish groups and their allies once it is freed from ISIS, a leading Kurdish politician told Reuters Monday. Raqqa, ISIS's main urban base of operations in Syria, is the focus...

U.S.-backed Syrian militias said they temporarily halted military operations near the Tabqa Dam on the Euphrates Monday to allow engineers access to carry out work. The Syrian Democratic Forces, an alliance of Arab and Kurdish militias supported by the U.S.-led coalition, has been...

NATO plans to spend 3 billion euros ($3.24 billion) to upgrade its satellite and computer technology over the next three years as the Western military alliance adapts to new threats, a senior official said. Seeking to deter hackers, and other threats including Iranian missiles, the...