In 2003 , he led the peshmerga into the northern city of Kirkuk -- the fourth-largest city in Iraq and its most ethnically mixed and contested -- following the American-led invasion of Iraq .
Iraq /location/location/contains Kirkuk
Iraq /location/location/contains Kirkuk
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Iraq
LOCATION
Kirkuk
LOCATION
/location/location/contains
Iraq
LOCATION
Kirkuk
LOCATION
/location/location/contains