WI The self-proclaimed Islamic State was able to take control of Syria and overthrow the Assad regime say pre-Migrant Crisis. Al-Baghdadi is now seen as the Liberator of the Syrian nation (to the Sunni's anyway) and so what is seen as Free Syria otl swears loyalty and in an oath of blood fuelled by high moral, quickly leads to the capture of Bagdad, effectively uniting the two countries under the militant movement.
Ignoring the wanking ASB's, what would be the possible plan of attack say over a short, mid and long term period assuming extremely high levels of success.
I'm going with the following:
S.T. - Capture of Lebanon and the Golan Heights, with securing of border provinces such as the Sinai
M.T. - Unification of these provinces, expansion into the wider Islamic World and all out war with most of the planet
L.T. War and economic collapse leading to the fracture of the Empire