Here’s a recently updated (May 3, 2013) report from the Congressional Research Service that has been made available by the Federation of American Scientists (FAS).
Instances of Use of United States Armed Forces Abroad, 1798-2013
23 pages; PDF
Written/Compiled by Barbara Salazar Torreon, Information Research Specialist
This report lists hundreds of instances in which the United States has used its Armed Forces abroad in situations of military conflict or potential conflict or for other than normal peacetime purposes. It was compiled in part from various older lists and is intended primarily to provide a rough survey of past U.S. military ventures abroad, without reference to the magnitude of the given instance noted. The listing often contains references, especially from 1980 forward, to continuing military deployments, especially U.S. military participation in multinational operations associated with NATO or the United Nations. Most of these post-1980 instances are summaries based on presidential reports to Congress related to the War Powers Resolution. A comprehensive commentary regarding any of the instances listed is not undertaken here.
Direct to Full Text Report
See Also: More CRS Reports Made Available by FAS