Between 2010 and 2020 the Bureau collected data on US strikes in Afghanistan, Pakistan, Somalia and Yemen from government, military and intelligence officials, and from credible media, academic and other sources, including on occasion Bureau researchers. Here we collect and present quantitative data on strikes and casualty estimates in spreadsheets, and qualitative data in narrative timelines. Please note that our data changes according to our current understanding of particular strikes. The information contained in the spreadsheets and timelines represents our best estimates.

More information on our methodology can be found here.