An American soldier sits on a military vehicle, at al-Omar oil field in Deir Al Zor, Syria March 23, 2019. An Arab tribal backlash against the rule of the Kurdish YPG militia has led to clashes, with over 150 killed and dozens injured. Arab tribal fighters initially drove out the Kurdish-led forces from several large towns but the SDF has begun to regain the upper hand. Arab tribal leaders say they have been deprived of their oil wealth after the Kurdish-led forces laid their hands on Syria's biggest oil wells after the departure of Islamic State. Washington has pushed for a bigger say for Arab inhabitants in running their affairs in SDF areas, Western diplomats say.

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Persons: Omar, Aboud, Syria Ethan Goldrich, Joel B Vowell, Deir al Zor, Sheikh Mahmoud al Jarallah, Suleiman Al, Khalidi, Rosalba O'Brien Organizations: REUTERS, SDF, Senior U.S, Kurdish YPG, Syrian Democratic Forces, Islamic, U.S, State Department, Thomson Locations: American, al, Deir Al Zor, Syria, Iran, AMMAN, Zor, U.S, Islamic State, Arab, Busayrah, Shuhail, Kurdish, Russia, Damascus, Deir al, Washington