Iraqi ground forces have begun an operation to retake Tal afar, one of the last cities in the country held by Islamic State group.

In a televised speech announcing the offensive, Iraqi Prime Minister Haider Al-Abadi said the group had the choice between “Surrender or Die”.

The announcement comes a month after capture by Iraqi Forces of Mosul, a major blow to the Islamic state

The army targeted Tal afar after seizing Mosul, ISIS’s main stronghold to the east, in July.

In preparation for ground operations, Iraqi warplanes have bombarded I.S. Positions in the city for several days.

Tal afar, which fell to is in 2014. Sits on a major road between Mosul and Syrian border was once a key supply route for Islamic State.