Bering Strait. July 2 to October 5. Naval forces sought to stop seal poaching.
Chile. August 28 to 30. U.S. forces protected the American consulate and the women and children who had taken refuge in it during a revolution in Valparaiso.
Hawaii. January 16 to April 1. Marines were landed ostensibly to protect American lives and property, but many believed actually to promote a provisional government under Sanford B. Dole. This action was disavowed by the United States.
Brazil. January. A display of naval force sought to protect American commerce and shipping at Rio de Janeiro during a Brazilian civil war.
Nicaragua. July 6 to August 7. U.S. forces sought to protect American interests at Bluefields following a revolution.
China. Marines were stationed at Tientsin and penetrated to Peking for protection purposes during the Sino-Japanese War.
China. A naval vessel was beached and used as a fort at Newchwang for protection of American nationals.
Korea. July 24, 1894 to April 3, 1896. A guard of marines was sent to protect the American legation and American lives and interests at Seoul during and following the Sino-Japanese War.
Colombia. March 8 to 9. U.S. forces protected American interests during an attack on the town of Bocas del Toro by a bandit chieftain.
Nicaragua. May 2 to 4. U.S. forces protected American interests in Corinto during political unrest.
Nicaragua. February 7 and 8. U.S. forces protected American lives and property at San Juan del Sur.
The Spanish-American War. On April 25, 1898, the United States declared war with Spain. The war followed a Cuban insurrection against Spanish rule and the sinking of the U.S.S. Maine in the harbor at Havana.
China. November 5, 1898 to March 15, 1899. U.S. forces provided a guard for the legation at Peking and the consulate at Tientsin during contest between the Dowager Empress and her son.
Nicaragua. American and British naval forces were landed to protect national interests at San Juan del Norte, February 22 to March 5, and at Bluefields a few weeks later in connection with the insurrection of Gen. Juan P. Reyes.
Samoa. February-May 15. American and British naval forces were landed to protect national interests and to take part in a bloody contention over the succession to the throne.
Philippine Islands. U.S. forces protected American interests following the war with Spain and conquered the islands by defeating the Filipinos in their war for independence.
China. May 24 to September 28. American troops participated in operations to protect foreign lives during the Boxer rising, particularly at Peking. For many years after this experience a permanent legation guard was maintained in Peking, and was strengthened at times as trouble threatened.
Colombia (State of Panama). November 20 to December 4. U.S. forces protected American property on the Isthmus and kept transit lines open during serious revolutionary disturbances.
Colombia - April 16 to 23. U.S. forces protected American lives and property at Bocas del Toro during a civil war.
Instances of Use of United States Armed Forces Abroad, 1798-2010
Congressional Research Service