Mission Support Site Conoco, a.k.a. Mission Support Site Euphrates, was an American airfield near the town of Khsham in Deir ez-Zor Governorate, Syria, and served to support the multi-national Combined Joint Task Force – Operation Inherent Resolve. The airbase, built with the 2014 launch of Operation Resolve and the American intervention in the Syrian civil war, is 5 miles (8.0 km) away from the Syrian outpost Conoco; the use of Conoco in the two names reflects names attached to the petroleum production sites in the area which were originally developed by American company Conoco.