The War Powers Resolution of 1973 requires Presidents to notify Congress within 48 hours of sending U.S. armed forces into hostilities or certain other situations abroad, and to provide specific information about those deployments. These “48-hour reports” are a primary means for Congress to ensure transparency and create the possibility of meaningful oversight of the President’s use of U.S. armed forces abroad.
The War Powers Resolution (WPR) is a landmark statute passed after the Vietnam War. Its aim is to restore the constitutional balance between Congress and the President in deciding when the nation goes to war. To create the transparency necessary for achieving this goal, the WPR requires the President to notify Congress within 48 hours of introducing U.S. armed forces into hostilities, deploying combat-equipped forces, or substantially enlarging those deployments (“48-hour reports”).
This project creates the first publicly accessible, searchable database analyzing the contents of all unclassified 48-hour reports submitted to Congress since the WPR was enacted over 45 years ago (more than 100 in total). The living database enables us to assess key questions about presidential exercise of war powers: Where and why are Presidents deploying armed forces abroad? How often do Presidents rely solely on their own constitutional authority to do so, and is that authority being stretched? Has reporting fulfilled the WPR’s requirements? In what ways are the WPR’s requirements insufficient to inform Congress of how the President is using our armed forces abroad, and in what ways is the WPR succeeding in providing meaningful transparency? Answers to these questions illuminated by this project will help lay the foundation for future study and reform.
Website data current through:
April 15, 2024
The map shows all 48-hour WPR reports for each presidential term since the WPR's enactment, displayed by reported location. It reflects geographic boundaries at the time of the relevant report(s). Use the timeline to see specific terms or play through all.
*Note: The map does not include visual representation of two 48-hour reports: the Sept. 24, 2001 reported deployment of "various combat-equipped and combat support forces to a number of foreign nations in the Central and Pacific Command areas of operations," as it included no specific locations within those areas; and the Jan. 5, 2024 report, as it did not provide a location.