In Syria, militias armed by the Pentagon fight those armed by the CIA

By Nabih Bulos, W.J. Hennigan and Brian Bennett

Syrian militias armed by different parts of the U.S. war machine have begun to fight each other on the plains between the besieged city of Aleppo and the Turkish border, highlighting how little control U.S. intelligence officers and military planners have over the groups they have financed and trained in the bitter five-year-old civil war.

The fighting has intensified over the last two months, as CIA-armed units and Pentagon-armed ones have repeatedly shot at each other while maneuvering through contested territory on the northern outskirts of Aleppo, U.S. officials and rebel leaders have confirmed.