Deir ez-Zor clashes (2011–2014)

Protests against the Syrian government and violence had been ongoing in the Syrian city of Deir ez-Zor since March 2011, as part of the wider Syrian Civil War, but large-scale clashes started following a military operation in late July 2011 to secure the city of Deir ez-Zor. The rebels took over most of the province by late 2013, leaving only small pockets of government control around the city of Deir ez-Zor.

Source: Wikipedia — Deir ez-Zor clashes (2011–2014) (CC BY-SA 4.0)