Agreement has Tehran footing bill for construction of power plants, transmission lines, possibly connecting countries via Iraq, as Islamic Republic seeks to deepen role in country

Troops, armored vehicles and drones deployed along a 110-kilometer route where Syrian Kurdish fighters were forced to withdraw following Ankara incursion

Statement from prime minister Thursday that Iran is growing bolder given lack of US response was public hint at growing unease expressed privately, according to Channel 13 news

5 armored vehicles, accompanied by Kurdish fighters, patrol area where regime forces were expected to deploy as part of a deal with Turkey

Following death of terror leader, Washington makes further moves to protect area's oil fields from extremists, Syria, Russia

French-initiated meeting, which follows US pullout and jihadist group leader's death, will 'look at next steps' to up coalition's 'presence in northeast Syria'

Military, intelligence sources cited by New York Times say Syria pullout endangered mission; info on IS leader's location said to have come from his wife, courier

Kurd commander claims Abu Hassan al-Muhajir died in joint coordinated operation with US military

Specialized team worked for a year to track down elusive terror chief Abu Bakr al-Baghdadi, Iraq's intelligence services reveal

From early days as US prisoner to joining jihad, becoming a leader, advocating brutality that shocked even al-Qaeda, and eventual demise: Abu Bakr al-Baghdadi, a timeline