Control of Terrain in Syria: May 20, 2015
May 20, 2015 - Institute for the Study of War![](https://understandingwar.org/sites/default/files/styles/thumb-wide/public/Syria%20Blobby%20Control%20Map%2020%20MAY%2015%20hi%20res-01_0.png?itok=yt8kc5JE)
ISIS seized the regime-held town of al-Sukna west of Deir ez-Zour City on May 14 and then seized the regime stronghold of Palmyra on May 20 after regime forces reportedly executed a full withdrawal from the city, prison, and military airbase.