The Northern Iraq offensive began on 4 June 2014, when the Islamic State of Iraq and Levant, assisted by various insurgent groups in the region, began a major offensive from its territory in Syria into Iraq against Iraqi and Kurdish forces, following earlier clashes that had begun in December 2013 involving guerillas.

Iraq, officially the Republic of Iraq, is a country in West Asia and in the geopolitical region known as the Middle East. With a population of over 46 million, it is the 31st-most populous country. It is a federal parliamentary republic that consists of 19 governorates. Iraq is bordered by Turkey to the north, Iran to the east, the Persian Gulf and Kuwait to the southeast, Saudi Arabia to the south, Jordan to the southwest, and Syria to the west. The capital and largest city is Baghdad. Iraqi people are diverse; mostly Arabs, as well as Kurds, Turkmen, Assyrians, Armenians, Yazidis, Mandaeans, Persians and Shabakis with similarly diverse geography and wildlife. Most Iraqis are Muslims – minority faiths include Christianity, Yazidism, Mandaeism, Yarsanism and Zoroastrianism. The official languages of Iraq are Arabic and Kurdish; others also recognized in specific regions are Turkish, Suret, and Armenian.