What we know about the shadowy Russian mercenary firm behind the attack on U.S. troops in Syria

One of the most complicated episodes in Syria's ever-twisting war took place  on the night of Feb. 7. In that incident, U.S. troops and their Syrian allies near the town of Deir al Zour were attacked by hundreds of pro-regime troops. The Americans responded with a devastating attack that the U.S. said left about 100 dead. […]

Source: http://www.washingtonpost.com/blogs/worldviews/wp/2018/02/23/what-we-know-about-the-shadowy-russian-mercenary-firm-behind-the-attack-on-u-s-troops-in-syria/