A number of military experts believe that this decision was made in reaction to the US betrayal of the SDF and withdrawal of American forces from Syria following an agreement with Turkey.
US President Donald Trump claimed on Wednesday that he will withdraw the American forces from Syria after what he called victory against the ISIL and inflicting heavy defeat on the terrorist group.
Despite the US claims, the ISIL still occupies some regions in Eastern Euphrates, including the towns of al-Souseh, al-Sha'afeh and al-Baqouz as well as the villages of al-Shajleh, al-Safafiyeh, al-Budran, Albu Khater, Abu Hassan and al-Morashedeh in Eastern Deir Ezzur.