This third comprehensive study of international terrorist attacks covers 2016, during which the Islamic State suffered several battlefield reversals but still continued its status as the most active, well-financed and well-armed terrorist group worldwide. Regionally- and country-organized, the study covers domestic and international incidents around the world, outlining several trends. The author offers several indicators of what to watch in the coming years. The new single-year format allows readers access to the most up-to-date information on terrorism, and its geographic focus more easily facilitates regional comparisons.