"The House Homeland Security Committee has been tracking terrorist activity linked to the Islamic State of Iraq and Syria (ISIS) since the group's formation. This report was produced by the Committee's Majority Staff and is intended to capture the scope of ISIS external operations against Western countries, including the United States, as well as other terrorist incidents inspired by the group. It provides a high-level examination of ISIS-linked plots and attacks targeting Western countries along with a summary of each incident. At the end of July, ISIS has been tied to at least 243 terrorist plots or attacks against the West since 2014."
U.S. House Committee on Homeland Security: https://homeland.house.gov/