A joint force of Russian mercenaries and Syrian soldiers attack a Conoco gas plant, near the city of Deir al-Zour on 7 February 2019.
The gas facility was defended by a joint force of Kurdish, Arab and US special forces.
The Russian and Syrian force consisted of about 500 men supported by tanks and artillery and the attack lasted about 4 hours.
The US special forces were able to call in Reaper drones, F-22 stealth fighter jets, F-15E Strike Fighters, B-52 bombers, AC-130 gunships and AH-64 Apache helicopters.
The resulting firefight left over 200 Russian and syrians dead whilst none of the US special forces were injured.