Al-Nusra Front, also known as Front for the Conquest of the Levant, was a Salafi jihadist organization fighting against Syrian Ba'athist government forces in the Syrian Civil War. Its aim was to overthrow president Bashar al-Assad and establish an Islamic state in Syria.Formed in 2012, in November of that year The Washington Post described al-Nusra as "the most aggressive and successful" of the rebel forces. While secular and pro-democratic rebel groups of the Syrian Revolution such as the Free Syrian Army were focused on ending the decades-long reign of Assad family, al-Nusra Front also sought the unification of Islamist forces in a post-Assad Syria, anticipating a new stage of the civil war. It denounced the international assistance in support of the Syrian opposition as "imperialism"; viewing it as a long-term threat to its Islamist goals in Syria.In December 2012, US Department of State designated it as a "foreign terrorist organization". In April 2013, Al-Nusra Front was publicly confirmed as the official Syrian affiliate of al-Qaeda, after Emir Ayman al-Zawahiri rejected the forced merger attempted by Abu Bakr al-Baghdadi and ordered the dissolution of newly-formed Islamic State of Iraq and Levant. In March 2015, the militia joined other Syrian Islamist groups to form a joint command center called the Army of Conquest. In July 2016, al-Nusra formally re-designated itself from Jabhat al-Nusra to Jabhat Fatah al-Sham ("Front for the Conquest of the Levant") and officially announced that it was breaking ties with Al-Qaeda.The announcement caused defections of senior Al-Nusra commanders and criticism from al-Qaeda ranks, provoking a harsh rebuke from Ayman al-Zawahiri, who denounced it as an "act of disobedience". On 28 January 2017, following violent clashes with Ahrar al-Sham and other rebel groups, Jabhat Fatah al-Sham (JFS) merged with four other groups to form Hayat Tahrir al-Sham, a new Sunni Islamist militant group. Tahrir al-Sham denies any links to the al-Qaeda network and said in a statement that the group is "an independent entity and not an extension of previous organizations or factions". Mutual hostilities eventually deteriorated into one of violent confrontations, with Al-Nusra commander Sami al-Oraydi accusing HTS of adopting nationalist doctrines. Sami al-Oraydi, alongside other Al-Qaeda loyalists like Abu Humam al-Shami, Abu Julaybib and others, mobilised Al-Qaeda personnel in northwestern Syria to establish an anti-HTS front in north-western Syria, eventually forming Hurras al-Din on 27 February 2018.