beirut syrian army ally take complete control albu kamal islamic state last significant town syria military news service run hezbollah say sunday army declare victory islamic state albu kamal early month jihadists stag counter-attack use sleeper cells hide town drive islamic state albu kamal mean villages along euphrates patch nearby desert well isolate pocket part country remain syria caliphate declare 2014. force battle islamic state syria iraq say expect go underground turn guerrilla insurgency use sleeper cells bomb western intelligence agencies say still able inspire attack civilians around world syrian army ally axis resistance expel daesh last stronghold syrian soil hezbollah news service report axis resistance use describe alliance iran syria shi ite militias include hezbollah british-based syrian observatory human right say sunday members withdraw town fight continue perimeter albu kamal islamic state area rule syria crumble year two rival military campaign syrian democratic force sdf alliance kurdish arab militias back u.s.-led coalition drive much territory north include former syrian capital raqqa syria army ally wag offensive across central eastern syria back russian air missile power two offensives mostly avoid conflict communication unite state russia however syrian iranian officials say damascus seek regain control areas hold sdf syrian army ally take back albu kamal islamic state