American and British armed forces have in recent days engaged in the heaviest fighting against Isis since the fall of the terror group’s caliphate nearly three years ago.
The clashes began on Thursday when hundreds of Isis fighters attacked a prison in the northeastern Syrian city of Hassakeh in an attempt to free an estimated 3,000 of their fellow fighters, who have been detained there since the extremist group was defeated in its last stronghold in March 2019.
