2017 Mayadin offensive
The 2017 Mayadin offensive was a military offensive launched by the Syrian Arab Army against members of the Islamic State (IS) in the Deir ez-Zor Governorate, following the breaking of the three-year siege of the city of Deir ez-Zor. The Mayadin offensive, conducted by Syrian Army troops, was conducted with the aim of capturing IS's new de facto capital of Mayadin, and securing the villages and towns around it.