. "Supported by:" . . . "* On 10 February 2014, ISIS retreated from Deir ez-Zor city, only to launch alarge-scale offensive in the provincetwo months later" . . "*Syrian Armed Forces" . "Sons of Islam Movement" . . "Islamic State of Iraq and the Levant" . "Rebel victory andISIL offensive" . . . ":Deir ez-Zor clashes (2011\u20132014)" . "al-Nusra Front" . "Jabhat al-Jihad wal-Bina' al-Islamiyya" . . "Ahrar al-Sham" . . . . . . "al-Okaidat clan (majority)" . "* By December 2013, nearly all of the oil fields in the province had fallen under rebel control" . "Deir ez-Zor clashes (2011\u20132014)" . . . "Deir ez-Zor clashes (2011\u20132014)" . "Jaysh Ahl as-Sunna wa-l-Jama\u2019a" . "Free Syrian Army(SNC-aligned units)" . . "Hezbollah" . . "* By May 2013, rebels controlled about half ofDeir Ez-Zorcity while the Syrian Arab Army controlled the military installations ofDeir al-Zorand most ofal-Thayemoil field" . . . "* Rebels captureAbu Kamal,Mayadin,al-Busayrah,Hajin, al-Tabni and al-Kubar" . . . "2011-11-26" . "Al-Nusra Front" . "Liwa Abu al-Fadhal al-Abbas(rebel claim)" . . "Free Syrian Army" . . . "17,000 fighters (opposition claim, all withdrawn)" . . "Liwa al-Fatihoun min Ard ash-Sham" . . . . . "Euphrates Islamic Liberation Front" . "Syrian Arab Republic" . "Islamic State of Iraq and the Levant(Islamic State of Iraquntil April 2013)" . . . . "* Rebels besiege the Deir ez-Zor airport" . . "9,000 soldiers and policemen, 150+ tanks" . "al-Okaidat clan (minority)" . . "* The Syrian Army launched a counter-attack on the previously lost positions later in 2013" . . . . . "Authenticity and Development Front" . . . "al-Bakkir clan" . "3,000+ fighters" .