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Iraqi Prime Minister Haider al-Abadi announced the start of military operations to liberate the northern city of Mosul from Islamic State militants today, launching the country on its toughest battle since American troops left nearly five years ago.
State TV aired a brief statement in the early hours today announcing the start of the widely anticipated military offensive to drive IS out of Iraq's second-largest city.
Broadcasts showed the prime minister, dressed in the uniform of the elite counterterrorism forces, speaking while flanked by senior military officers.
"These forces that are liberating you today, they have one goal in Mosul which is to get rid of Daesh and to secure your dignity. They are there for your sake," he told the city's residents, using an alternate name for the militant group. "God willing, we shall win."
The thuds of sporadic artillery shelling rumbled across the rolling Nineveh plains in the direction of Mosul, witnesses said. State TV broadcast patriotic music within minutes of the announcement.
The push to retake Mosul will be the biggest military operation in Iraq since American troops left in 2011 and, if successful, the strongest blow yet to the Islamic State. A statement on Al-Abadi's website pledged the fight for the city marked a new phase that would lead to the liberation of all Iraqi territory from the militants this year.
In Washington, Defence Secretary Ash Carter called the start of Iraqi operations to liberate Mosul "a decisive moment in the campaign" to deliver a lasting defeat to the Islamic State group.
Carter said the United States and other members of the international coalition "stand ready to support the Iraqi Security Forces, Peshmerga fighters and the people of Iraq in the difficult fight ahead."
Iraqi forces have been massing around the city in recent days. They include members of the elite special forces, who are expected to lead the charge into the city itself.
Mosul is home to more than a million civilians. The city fell to IS fighters during a lightning charge in June 2014 that left nearly a third of Iraq in militants' hands and plunged the country into its most severe crisis since the US-led invasion in 2003.
After seizing Mosul, IS leader Abu Bakr al-Baghdadi visited the city to declare an Islamic caliphate that at one point covered nearly a third of Iraq and Syria.
But since late last year, the militants have suffered battlefield losses in Iraq and their power in the country has largely shrunk to Mosul and small towns in the country's north and west. Mosul is about 360 kilometres northwest of the capital, Baghdad.
The operation to retake Mosul is expected to be the most complex yet for Iraq's military, which has been rebuilding from its humiliating 2014 defeat.