Timeline: the Rise, Spread and Fall of the Islamic State
1. The group changed its name to the Islamic State of Iraq and Syria (ISIS) in 2013
2. ISIS launched an offensive on Mosul and Tikrit in June 2014
3. On June 29, ISIS leader Abu Bakr al Baghdadi announced the formation of a caliphate stretching from Aleppo in Syria to Diyala in Iraq, and renamed the group the Islamic State
4. A U.S.-led coalition began airstrikes against ISIS in Iraq on August 7, 2014, and expanded the campaign to Syria the following month
5. On October 15, the United States named the campaign "Operation Inherent Resolve"
6. Over the next year, the United States conducted more than 8,000 airstrikes in Iraq and Syria
7. ISIS suffered key losses along Syria's border with Turkey, and by the end of 2015, Iraqi forces had made progress in recapturing Ramadi
8. But in Syria, ISIS made gains near Aleppo, and still firmly held Raqqa and other strongholds
9. In 2015, ISIS expanded into a network of affiliates in at least eight other countries
10. Its branches, supporters, and affiliates increasingly carried out attacks beyond the borders of its so-called caliphate
11. In October, ISIS's Egypt affiliate bombed a Russian airplane, killing 224 people
12. On November 13, 130 people were killed and more than 300 injured in a series of coordinated attacks in Paris
13. And in June 2016, a gunman who pledged support to ISIS killed at least four dozen people at a nightclub in Orlando, Florida
14. By December 2017, the ISIS caliphate had lost 95 percent of its territory, including its two biggest properties, Mosul, Iraq's second largest city, and the northern Syrian city of Raqqa, its nominal capital
15. The Iraqi Prime Minister Haider al Abadi declared victory over the Islamic State in Iraq on December 9, 2017
16. But ISIS was still inspiring and carrying out attacks all over the world, including New York City