Battle to recapture Mosul from IS has begun

One of the biggest military battles in recent years has begun as forces try to recapture Mosul from Islamic State.

The UN is concerned the terror group may use civilians in the Iraqi city as human shields.

There are fears up to one million people may be forced to flee their homes in Mosul.

Fawaz Gerges - Professor of International Relations at London School of Economics -  says the move is significant

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