Assad's regime fell due to a combination of internal discontent, external conflicts weakening his support, and a surprise offensive by the rebel group HTS. Key factors included Iran and Hezbollah being distracted, Russia's focus on Ukraine, and economic challenges weakening Assad's army.
The main rebel group is HTS (Hayat Tahrir al-Sham), previously known as Nusra Front, which was al-Qaeda's branch in Syria. HTS has been trying to distance itself from its jihadist past and project itself as a legitimate governing authority.
External conflicts, such as Iran's distractions and Russia's focus on Ukraine, weakened Assad's support network. This made it difficult for him to maintain control as his key allies were preoccupied elsewhere.
The civil war began in 2011 during the Arab Spring, when protests against the Assad regime were met with violent repression. This escalated into a full-scale conflict involving various rebel groups and foreign interventions.
The new leadership faces challenges in establishing law and order, preventing looting and revenge killings, and ensuring political freedom without allowing the country to descend into chaos. There is also concern about potential persecution of minority groups.
Reactions are mixed; some are celebrating and hopeful for a new beginning, while others are fearful of potential instability and considering leaving the country.
Al-Julani played a key role in the split between Al-Qaeda and the Islamic State. He has been instrumental in rebranding HTS to distance it from its jihadist past and focus on governing the territory it controls.
The world was stunned over the weekend as rebel forces in Syria captured the capital of Damascus, forcing President Bashar al-Assad to flee and ending the final chapter of his violent regime. Assad is reported to have fled to Russia whilst opposition forces now loot his empty palace and people celebrate on the streets.
But who are the Syrian rebels who toppled Assad’s rule? And why has it happened now after decades of the Assad family in charge.
Five BBC experts - Frank Gardner, Lyse Doucet, Lina Sinjab, Mina al Jawi and Barry Marston - take us through the story.
Instagram: @bbcwhatintheworld WhatsApp: +44 0330 12 33 22 6 Email: [email protected] Presenter: Hannah Gelbart Producers: Emily Horler and Emilia Jansson Editor: Verity Wilde