ISIS seized the last regime-controlled border crossing between Syria and Iraq with the capture of the al-Tanf crossing on May 22 following a regime withdrawal.
Control of Urban Terrain in Syria
ISIS seized the regime-held town of al-Sukna west of Deir ez-Zour City on May 14, severing the regime’s ground line of communication from Palmyra in the central Homs Desert to Deir ez-Zour City and effectively isolating remaining regime positions in western Deir ez-Zour.
Jennifer Cafarella is the Chief of Staff and inaugural National Security Fellow at the Institute for the Study of War (ISW). Her work focuses on US defense strategy including how the United States must adapt to current and future threats, with particular depth on Syria, jihadism, and the Middle East. Her expertise has been recognized through fellowships at the International Centre for the Study of Radicalisation at King’s College in London as well as the George Mason University’s National Security Institute.