<sod >" Earlier, the Islamist militants who overran cities in Iraq warned battle will ârageâ as it planned to march on the capital Baghdad, just a day after 500,000 people were forced to flee their homes in Mosul, the country's second biggest city.< eod>< sod > In Mosul, Iraqâs second biggest city, Sunni militants staged a parade of American Humvees seized from the collapsing Iraqi army, just a day after 500,000 people were forced to flee the area.< eod>