"Many wars or conflicts in U.S. history have federally designated 'periods of war,' dates marking their beginning and ending. These dates are important for qualification for certain veterans' pension or disability benefits. Confusion can occur because beginning and ending dates for 'periods of war' in many nonofficial sources are often different from those given in treaties and other official sources of information, and armistice dates can be confused with termination dates. This report lists the beginning and ending dates for 'periods of war' found in Title 38 of the 'Code of Federal Regulations', dealing with the Department of Veterans Affairs (VA). It also lists and differentiates other beginning dates given in declarations of war, as well as termination of hostilities dates and armistice and ending dates given in proclamations, laws, or treaties. Also included are dates for the current conflicts in Iraq and Afghanistan. This report will be updated when events warrant. For additional information, see CRS [Congressional Research Service] Report RL31133, 'Declarations of War and Authorizations for the Use of Military Force: Historical Background and Legal Implications', by Jennifer K. Elsea and Richard F. Grimmett."
CRS Report for Congress, RS21405