1, because dozens of Syrian rebels have weapons, although Aleppo won, other places are still in the hands of the rebels, and they are unwilling to surrender because the rebels have weapons, so they are naturally called refugees.
2. Syria is a small country, depending on what a big country means. If the United States intervenes, it is not a problem to fight a tug-of-war. In addition, neighboring countries such as Israel, Iran, Turkey, Saudi Arabia, the European Union, the United States and Russia all intervened.
3. There are still reconstruction problems in Syria. Reconstruction is an astronomical figure. If the economy is not good, it is naturally a big problem. That year was a crisis caused by economic problems.