Obama, who is making his eighth and final visit to the United Nations as president, met with Iraqi Prime Minister Haider al-Abadi before the gathering of world leaders. "What we have been discussing and focusing on is to go right at the heart of the ISIL operation in Mosul," Obama said, using the acronym for the Islamic State. "This is going to be a challenging battle, Mosul is a large city."
Obama said preparations for the fight, including the movement of Iraqi and Kurdish forces into the area, had begun. The most critical phase of the battle likely will come after Islamic State fighters have been forced from the city, when the Iraqis will have to begin the difficult process of rebuilding and governing the region. Mosul is an ethnically and religiously diverse region that has been a center of Sunni rebellion against the Shiite-dominated government in Baghdad.
Obama said he stressed to Abadi the need to rebuild Mosul in "a way that assures not only ISIL does not come back but that its extremist ideology born out of desperation will not return." The two leaders also discussed the importance of moving humanitarian aid quickly into the city after the battle.
"It will be a tough fight," Obama said, according to a White House pool report. "This is going to be hard, this is going to be challenging."