When  did the revolutionary wave which  Syria enjoyed an improvement in relations with several of the states in its region in the 21st century, prior to began
Arab Spring The Arab Spring, (Arabic: الربيع العربي‎ ‎ "ar-Rabīʻ al-ʻArabī") also referred to as Arab revolutions (Arabic: الثورات العربية‎ ‎ "aṯ-'awrāt al-ʻarabiyyah"), was a revolutionary wave of both violent and non-violent demonstrations, protests, riots, coups and civil wars in North Africa and the Middle East that began on 17 December 2010 in Tunisia with the Tunisian Revolution.
Inter-rebel conflict during the Syrian Civil War The inter-rebel conflict during the Syrian Civil War started after fighting erupted between the Syrian opposition groups: the Free Syrian Army (FSA), the Army of Mujahedeen, the Islamic Front, and the Islamic State of Iraq and the Levant (ISIL). In early January 2014, serious clashes between the groups erupted in the north of the country. Opposition groups near Aleppo attacked ISIL in two areas, Atarib and Anadan, which were both strongholds of the fundamentalist Sunni organization. Despite the conflict between ISIL and other rebels, one faction of ISIL has cooperated with the al-Nusra Front and the Green Battalion (a group of Saudi fighters) to combat Hezbollah in the Battle of Qalamoun.