The coalition carried out the strike after warning shots and even "Russian attempts" to halt the advance on the town failed to stop the militants from moving south into an agreed upon “deconfliction zone,” according to follow-up tweets. The US-led coalition said in a statement that the militia which consisted of dozens of militants driving a tank and a number of construction vehicles ignored warning shots from US aircraft. An opposition fighter from the US-backed groups spoke to Reuters and said that the hit convoy comprised Assad terrorists and Iran-backed militias and was headed to al-Tanf base. The militia were struck after they had advanced to about 17 miles (27 km) from the base, according to Reuters. Tanf is part of a region known as the Badia, which consists of vast, sparsely populated desert territory that stretches all the way to the Jordanian and Iraqi borders.
May 18 #Coalition struck #Syrian pro-regime forces advancing in a de-confliction zone near At Tanf posing a threat to #US partner forces1/3— Inherent Resolve (@CJTFOIR) May 18, 2017