1798-1800 France Undeclared naval war against France, marines land in Puerto Plata.

1801-1805 Tripoli War with Tripoli (Libya), called "First Barbary War".

1806 Spanish Mexico Military force enters Spanish territory in headwaters of the Rio Grande.

1806-1810 Spanish and French in Caribbean US naval vessels attack French and Spanish shipping in the Caribbean.

1810 Spanish West Florida Troops invade and seize Western Florida, a Spanish possession.

1812 Spanish East Florida Troops seize Amelia Island and adjacent territories.

1812 Britain War of 1812, includes naval and land operations.

1813 Marquesas Island Forces seize Nukahiva and establish first US naval base in the Pacific.

1814 Spanish (East Florida) Troops seize Pensacola in Spanish East Florida.

1814-1825 French, British and Spanish in Caribbean US naval squadron engages French, British and Spanish shipping in the Caribbean.

1815 Algiers and Tripoli US naval fleet under Captain Stephen Decatur wages "Second Barbary War" in North Africa.

1816-1819 Spanish East Florida Troops attack and seize Nicholls' Fort, Amelia Island and other strategic locations. Spain eventually cedes East Florida to the US.

1822-1825 Spanish Cuba and Puerto Rico Marines land in numerous cities in the Spanish island of Cuba and also in Spanish Puerto Rico.

1827 Greece Marines invade the Greek islands of Argentiere, Miconi and Andross.

1831 Falkland/Malvinas Islands US naval squadrons aggress the Falkland Islands in the South Atlantic.

1832 Sumatra, Dutch East Indies US naval squadrons attack Qallah Battoo.

1833 Argentina Forces land in Buenos Aires and engage local combatants.

1835-1836 Peru Troops dispatched twice for counter-insurgency operations.

1836 Mexico Troops assist Texas war for independence.

1837 Canada Naval incident on the Canadian border leads to mobilization of a large force to invade Canada. War is narrowly averted.

1838 Sumatra, Dutch East Indies US naval forces sent to Sumatra for punitive expedition.

1840-1841 Fiji Naval forces deployed, marines land.

1841 Samoa Naval forces deployed, marines land.

1842 Mexico Naval forces temporarily seize cities of Monterey and San Diego.

1843 China Marines land in Canton.

1843 Ivory Coast Marines land.

1846-1848 Mexico Full-scale war. Mexico cedes half of its territory to the US by the Treaty of Guadeloupe Hidalgo.

1849 Ottoman Empire (Turkey) Naval force dispatched to Smyrna.

1852-1853 Argentina Marines land in Buenos Aires.

1854 Nicaragua Navy bombards and largely destroys city of San Juan del Norte. Marines land and set fire to the city.

1854 Japan Commodore Perry and his fleet deploy at Yokohama.

1855 Uruguay Marines land in Montevideo.

1856 Colombia (Panama Region) Marines land for counter-insurgency campaign.

1856 China Marines deployed in Canton.

1856 Hawaii Naval forces seize small islands of Jarvis, Baker and Howland in the Hawaiian Islands.

1857 Nicaragua Marines land.

1858 Uruguay Marines land in Montevideo.

1858 Fiji Marines land.

1859 Paraguay Large naval force deployed.

1859 China Troops enter Shanghai.

1859 Mexico Military force enters northern area.

1860 Portuguese West Africa Troops land at Kissembo.

1860 Colombia (Panama Region) Troops and naval forces deployed.

1863 Japan Troops land at Shimonoseki.

1864 Japan Troops landed in Yedo.

1865 Colombia (Panama Region) Marines landed.

1866 Colombia (Panama Region) Troops invade and seize Matamoros, later withdraw.

1866 China Marines land in Newchwang.

1867 Nicaragua Marines land in Managua and Leon in Nicaragua.

1867 Formosa Island (Taiwan) Marines land.

1867 Midway Island Naval forces seize this island in the Hawaiian Archipelago for a naval base.

1868 Japan Naval forces deployed at Osaka, Hiogo, Nagasaki, Yokohama and Negata.

1868 Uruguay Marines land at Montevideo.

1870 Colombia Marines landed.

1871 Korea Forces landed.

1873 Colombia (Panama Region) Marines landed.

1874 Hawaii Sailors and marines landed.

1876 Mexico Army again occupies Matamoros.

1882 British Egypt Troops land.

1885 Colombia (Panama Region) Troops land in Colon and Panama City.

1885 Samoa Naval force deployed.

1887 Hawaii Navy gains right to build permanent naval base at Pearl Harbor.

1888 Haiti Troops landed.

1888 Samoa Marines landed.

1889 Samoa Clash with German naval forces.

1890 Argentina US sailors land in Buenos Aires.

1891 Chile US sailors land in the major port city of Valparaiso.

1891 Haiti Marines land on US-claimed Navassa Island.

1893 Hawaii Marines and other naval forces land and overthrow the monarchy. Read More | President Cleveland's Message

1894 Nicaragua Marines land at Bluefields on the eastern coast.

1894-1895 China Marines are stationed at Tientsin and Beijing. A naval ship takes up position at Newchwang.

1894-1896 Korea Marines land and remain in Seoul.

1895 Colombia Marines are sent to the town Bocas del Toro.

1896 Nicaragua Marines land in the port of Corinto.

1898 Nicaragua Marines land at the port city of San Juan del Sur.

1898 Guam Naval forces seize Guam Island from Spain and the US holds the island permanently.

1898 Cuba Naval and land forces seize Cuba from Spain.

1898 Puerto Rico Naval and land forces seize Puerto Rico from Spain and the US holds the island permanently.

1898 Philippines Naval forces defeat the Spanish fleet and the US takes control of the country.

1899 Philippines Military units are reinforced for extensive counter-insurgency operations.

1899 Samoa Naval forces land

1899 Nicaragua Marines land at the port city of Bluefields.

1900 China US forces intervene in several cities.

1901 Colombia/Panama Marines land.

1902 Colombia/Panama US forces land in Bocas de Toro

1903 Colombia/Panama With US backing, a group in northern Colombia declares independence as the state of Panama

1903 Guam Navy begins development in Apra Harbor of a permanent base installation.

1903 Honduras Marines go ashore at Puerto Cortez.

1903 Dominican Republic Marines land in Santo Domingo.

1904-1905 Korea Marines land and stay in Seoul.

1906-1909 Cuba Marines land. The US builds a major naval base at Guantanamo Bay.

1907 Nicaragua Troops seize major centers.

1907 Honduras Marines land and take up garrison in cities of Trujillo, Ceiba, Puerto Cortez, San Pedro, Laguna and Choloma.

1908 Panama Marines land and carry out operations.

1910 Nicaragua Marines land in Bluefields and Corinto.

1911 Honduras Marines intervene.

1911-1941 China The US builds up its military presence in the country to a force of 5000 troops and a fleet of 44 vessels patrolling China's coast and rivers.

1912 Cuba US sends army troops into combat in Havana.

1912 Panama Army troops intervene.

1912 Honduras Marines land.

1912-1933 Nicaragua Marines intervene. A 20-year occupation of the country follows.

1913 Mexico Marines land at Ciaris Estero.

1914 Dominican Republic Naval forces engage in battles in the city of Santo Domingo.

1914 Mexico US forces seize and occupy Mexico's major port city of Veracrus from April through November.

1915-1916 Mexico An expeditionary force of the US Army under Gen. John J. Pershing crosses the Texas border and penetrates several hundred miles into Mexican territory. Eventually reinforced to over 11,000 officers and men.

1914-1934 Haiti Troops land, aerial bombardment leading to a 19-year military occupation.

1916-1924 Dominican Republic Military intervention leading to 8-year occupation.

1917-1933 Cuba Landing of naval forces. Beginning of a 15-year occupation.

1918-1920 Panama Troops intervene, remain on "police duty" for over 2 years.

1918-1922 Russia Naval forces and army troops fight battles in several areas of the country during a five- year period.

1919 Yugoslavia Marines intervene in Dalmatia.

1919 Honduras Marines land.

1920 Guatemala Troops intervene.

1922 Turkey Marines engaged in operations in Smyrna (Izmir).

1922-1927 China Naval forces and troops deployed during 5-year period.

1924-1925 Honduras Troops land twice in two-year period.

1925 Panama Marines land and engage in operations.

1927-1934 China Marines and naval forces stationed throughout the country.

1932 El Salvador Naval forces intervene.

1933 Cuba Naval forces deployed.

1934 China Marines land in Foochow.

1946 Iran Troops deployed in northern province.

1946-1949 China Major US army presence of about 100,000 troops, fighting, training and advising local combatants.

1947-1949 Greece US forces wage a 3-year counterinsurgency campaign.

1948 Italy Heavy CIA involvement in national elections.

1948-1954 Philippines Commando operations, "secret" CIA war.

1950-1953 Korea Major forces engaged in war in Korean peninsula.

1953 Iran CIA overthrows government of Prime Minister Mohammed Mossadegh. Read More

1954 Vietnam Financial and materiel support for colonial French military operations, leads eventually to direct US military involvement.

1954 Guatemala CIA overthrows the government of President Jacobo Arbenz Guzman.

1958 Lebanon US marines and army units totaling 14,000 land.

1958 Panama Clashes between US forces in Canal Zone and local citizens.

1959 Haiti Marines land.

1960 Congo CIA-backed overthrow and assassination of Prime Minister Patrice Lumumba.

1960-1964 Vietnam Gradual introduction of military advisors and special forces.

1961 Cuba CIA-backed Bay of Pigs invasion.

1962 Cuba Nuclear threat and naval blockade.

1962 Laos CIA-backed military coup.

1963 Ecuador CIA backs military overthrow of President Jose Maria Valesco Ibarra.

1964 Panama Clashes between US forces in Canal Zone and local citizens.

1964 Brazil CIA-backed military coup overthrows the government of Joao Goulart and Gen. Castello Branco takes power. Read More

1965-1975 Vietnam Large commitment of military forces, including air, naval and ground units numbering up to 500,000+ troops. Full-scale war, lasting for ten years.

1965 Indonesia CIA-backed army coup overthrows President Sukarno and brings Gen. Suharto to power.

1965 Congo CIA backed military coup overthrows President Joseph Kasavubu and brings Joseph Mobutu to power.

1965 Dominican Republic 23,000 troops land.

1965-1973 Laos Bombing campaign begin, lasting eight years.

1966 Ghana CIA-backed military coup ousts President Kwame Nkrumah.

1966-1967 Guatemala Extensive counter-insurgency operation.

1969-1975 Cambodia CIA supports military coup against Prince Sihanouk, bringing Lon Nol to power. Intensive bombing for seven years along border with Vietnam.

1970 Oman Counter-insurgency operation, including coordination with Iranian marine invasion.

1971-1973 Laos Invasion by US and South Vietnames forces.

1973 Chile CIA-backed military coup ousts government of President Salvador Allende. Gen. Augusto Pinochet comes to power.

1975 Cambodia Marines land, engage in combat with government forces.

1976-1992 Angola Military and CIA operations.

1980 Iran Special operations units land in Iranian desert. Helicopter malfunction leads to aborting of planned raid.

1981 Libya Naval jets shoot down two Libyan jets in maneuvers over the Mediterranean.

1981-1992 El Salvador CIA and special forces begin a long counterinsurgency campaign.

1981-1990 Nicaragua CIA directs exile "Contra" operations. US air units drop sea mines in harbors.

1982-1984 Lebanon Marines land and naval forces fire on local combatants.

1983 Grenada Military forces invade Grenada.

1983-1989 Honduras Large program of military assistance aimed at conflict in Nicaragua.

1984 Iran Two Iranian jets shot down over the Persian Gulf.

1986 Libya US aircraft bomb the cities of Tripoli and Benghazi, including direct strikes at the official residence of President Muamar al Qadaffi.

1986 Bolivia Special Forces units engage in counter-insurgency.

1987-1988 Iran Naval forces block Iranian shipping. Civilian airliner shot down by missile cruiser.

1989 Libya Naval aircraft shoot down two Libyan jets over Gulf of Sidra.

1989 Philippines CIA and Special Forces involved in counterinsurgency.

1989-1990 Panama 27,000 troops as well as naval and air power used to overthrow government of President Noriega.

1990 Liberia Troops deployed.

1990-1991 Iraq Major military operation, including naval blockade, air strikes; large number of troops attack Iraqi forces in occupied Kuwait.

1991-2003 Iraq Control of Iraqi airspace in north and south of the country with periodic attacks on air and ground targets.

1991 Haiti CIA-backed military coup ousts President Jean-Bertrand Aristide.

1992-1994 Somalia Special operations forces intervene.

1992-1994 Yugoslavia Major role in NATO blockade of Serbia and Montenegro.

1993-1995 Bosnia Active military involvement with air and ground forces.

1994-1996 Haiti Troops depose military rulers and restore President Jean-Bertrand Aristide to office.

1995 Croatia Krajina Serb airfields attacked.

1996-1997 Zaire (Congo) Marines involved in operations in eastern region of the country.

1997 Liberia Troops deployed.

1998 Sudan Air strikes destroy country's major pharmaceutical plant.

1998 Afghanistan Attack on targets in the country.

1998 Iraq Four days of intensive air and missile strikes.

1999 Yugoslavia Major involvement in NATO air strikes.

2001 Macedonia NATO troops shift and partially disarm Albanian rebels.

2001 Afghanistan Air attacks and ground operations oust Taliban government and install a new regime.

2003 Iraq Invasion with large ground, air and naval forces ousts government of Saddam Hussein and establishes new government.

2003-present Iraq Occupation force of 150,000 troops in protracted counter-insurgency war