The Northern Iraq offensive began on 5 June 2014, when the Islamic State of Iraq and the Levant (ISIL; sometimes referred to as The Islamic State (IS)) and aligned forces began a major offensive in northern Iraq against the Iraqi government, following earlier clashes, which began in December 2013.
ISIL and aligned forces captured several cities and other territory, beginning with an attack on Samarra on 5 June followed by the seizure of Mosul on 10 June and Tikrit on 11 June. As Iraqi government forces fled south on 13 June, the Kurdish forces took control of the oil hub of Kirkuk, part of the disputed territories of Northern Iraq.
The Islamic State (IS) called the battles of Mosul and Saladin "battle of Asad Allaah al-Bilawi" al-Bilawi is Adnan Ismail Najm al-Bilawi Al-Dulaimi, commander of Battle of Mosul and he was a colonel in the former Iraqi army.
By late June, Iraq had lost control of its border with Jordan and Syria. Prime Minister of Iraq Nouri al-Maliki called for a national state of emergency on 10 June following the attack on Mosul, which had been seized overnight. However, despite the security crisis, Iraq's parliament did not allow Maliki to declare a state of emergency; many Sunni Arab and ethnic Kurdish legislators boycotted the session because they opposed expanding the prime minister's powers.