In 2003, the United States and Britain allied forces overthrew Saddam Hussein's regime on the grounds of "weapons of mass destruction". Saddam himself was hanged and executed at the end of Eid al-Adha in 2006 at the age of 69.
Later on 20 1 1, Gaddafi, another strongman in the Middle East, was captured by rebels in the civil war, tortured to death by NATO bombing, and the regime was overthrown.
Syrian President Bashar al-Assad insisted on the war of resistance for six years, and now he is gradually recovering lost ground and restoring peace.
The main reason is that Syria has the support of Russian military forces. Of course, Russia is not supporting the Bashar regime, but defending Russia's last military base in the Middle East. If we lose our military base in Syria, Russian forces will withdraw from the Middle East, and the lost regional initiative will even have a great impact on the national economy. The Syrian war is a war that Russia cannot fail.
On the other hand, Saddam and Gaddafi are both seeking regional hegemony and trying to break the regional geopolitical pattern. Gaddafi, in particular, offended all the "five hooligans", angered many countries in the world and was isolated. These two strongmen even want to give up using petrodollars for settlement, which simply touches the American scale.
Of course, another main reason is that since Trump took office, a series of policies have led to continuous civil strife in the United States and Europe, and anti-war sentiment is high. Syria has learned the lessons of its predecessors and actively sought peaceful solutions, attracting the response and support of the international community.