Final answer:
The correct sequence preceding the formation of ISIS includes the Islamic revolution in Iran, the creation of al-Qaeda, the passage of the Patriot Act, the September 11 attacks, the US invasion of Iraq, the execution of Saddam Hussein, and lastly the emergence of ISIS itself.
Step-by-step explanation:
Sequence of Events Leading to the Formation of ISIS
To arrange the events that came before the formation of ISIS in the correct sequence, we must look at the historical context that led to the rise of this extremist group:
- In Iran, an Islamic revolution overthrows the Shah (1979).
- Osama bin Laden forms al-Qaeda (1988).
- The United States Congress passes the Patriot Act (October 26, 2001).
- September 11 attacks take place (September 11, 2001).
- The United States invades Iraq (March 20, 2003).
- Saddam Hussein is executed by an Iraqi military court (December 30, 2006).
- A group of Islamic militants called ISIS emerges (in its earliest form in 1999 as Jama'at al-Tawhid wal-Jihad, but became prominently active and declared a caliphate in 2014).
The emergence of ISIS was influenced by prior events including the formation of al-Qaeda, the US invasion of Iraq, and the consequent instability in the region.