Airstrike data was compiled from press releases issued by the United States Central Command, or Centcom. From Nov. 3 to Dec. 15, Centcom reported strikes over two- or three-day periods instead of each day. The daily strikes shown on the map and chart during that period are the average number of strikes each day. Circles represent the number of strikes in the vicinity of that location.

Data for the areas of ISIS control and attacks are from The Institute for the Study of War. Road network data from East View Geospatial and OpenStreetMap.