:-) It's Ql Qaeda all over again, Ironic!!
Not quite; if the Islamic State doesn't control territory it's entire ideological position is seriously undermined:
Its dramatic loss of territory has eroded the IS’s legitimacy, which was based on territorial control and continuous territorial expansion, which distinguished it from al-Qaʿida and other jihadist organizations. This drive to continuously expand its territorial control, as promised in the group's rallying cry, bakiyyah wa tatamadad (literally: remaining and expanding), was an important part of the organization’s founding principles. It allowed the Islamic State to offer services to the civilian population that was under its control, and to implement its radical interpretation of Islamic law (shariʿa). Thus, losing control over large parts of Iraq and Syria was a serious blow to the organization, which marketed itself as the realization of "the promise of Allah" (as it titled its caliphate declaration in June 2014) and a long held ideal in Islamic history, the caliphate-state, with its intention to continuously expand across the Middle East.
In addition to losing territory, the group also lost its large flow of foreign fighters. After it declared its caliphate in 2014, between 27,000 and 31,000 people (men and women) from 86 countries flocked to the IS stronghold and joined its ranks. These volunteers came in response to the call to Muslims worldwide to perform hijrah and immigrate to the Islamic State. As a result of this mobilization between 2014 and 2016, many countries were faced with challenge of trying to prevent people from traveling to Iraq and Syria to join the group. However, since the collapse of the caliphate, thousands of foreign fighters have attempted to return to their countries of origin, dramatically affecting the IS's operations.