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The diplomatic history of the United States oscillated among three positions: isolation from diplomatic entanglements (but with economic connections to the world); alliances with European and other military partners; and unilateralism, or becoming entangled in the world but operating on its own decisions.
1778 - Treaty of Alliance (1778). France and US agreed to come to each others aid in event of British attack from the present time and forever, abrogated in late 1799 after XYZ Affair.
1795 - Jay Treaty. Opens 10 years of peaceful trade with Britain; British evacuate western forts; boundary lines and debts (iun both directions) to be settled by arbitration. Approved by Senate (1795) after intense opposition by Jeffersonians; became major issue in formation of First Party System
1795 - Treaty of Madrid (1795) established boundaries with the Spanish colonies of Florida and Louisiana and guaranteed navigation rights on the Mississippi River.
1796 - Treaty of Tripoli; Peace treaty between the United States and the Barbary State of Tripoli. Notable for the confirmation by the U.S. that the American government was non-religious in origin and practice. Violated in 1801 by the Basha of Tripoli which led to the Tripolitanian War.
1797 - XYZ affair; humiliation by French diplomats; threat of war with France.
1798-1800 - Quasi-War. Undeclared naval war with France.
1819 - Adams-Onis Treaty: Spain ceded Florida to US for US$5,000,000 (after Florida was invaded by Andrew Jackson with unclear approval of President Monroe on the pretense of suppressing Seminole Indian raids), US agreed to assume claims against Spain, US gave up claims to Texas.
1823 - Monroe Doctrine. British Foreign Minister Canning proposed US join England in stating that European powers not be permitted further American colonization. Monroe states on December 2 as independent American Policy.
1833 - Argentina. A naval force was sent to attack the Falklands Islands, at the time under Argentine control, in retaliation for the seizing of US ships fishing in Argentine waters. Puerto Soledad settlement virtually destroyed.
1835-36 - Peru. Marines protected American interests in Callao and Lima during an attempted revolution.
1837 - Caroline Affair; A band of Canadian rebels took refuge on Navy island on Canadian side Niagara River, US sympathizers supplied them with aid via steamboat Caroline. On December 29, Canadian forces crossed to US and set Caroline ablaze. May 29, 1838 US forces burned British steamer Sir Robert Peel while in US.
1838 - Aroostook War. Disagreement over Northern Boundary of Maine resulted in troops being called on both sides, Martin Van Buren arranged truce while a commission was established.
1850 - Clayton-Bulwer Treaty. US and Britain agreed that both nations were not to colonize or control any Central American republic, neither nation would seek exclusive control of Isthmian canal, if canal built protected by both nations for neutrality and security. Any canal built open to all nations on equal terms.
1852-53 - Argentina; February 3 to 12, 1852; September 17, 1852 to April 1853. Marines were landed and maintained in Buenos Aires to protect American interests during a revolution.
1853 - Gadsden Purchase: Purchase of 30,000 square miles (78,700 km²) south of Gila River for US$10,000,000 for purpose of Railroad line pass through Rockies.
1853 - Nicaragua; March 11 to 13. U.S. forces landed to protect American lives and interests during political disturbances.
1854 - Kanagawa Treaty; Millard Fillmore sent Matthew Perry to Tokyo, he arrived in 1853 and delivered a letter, returning next year with seven warships and a treaty signed opening two Japanese ports and guaranteeing safety of shipwrecked US seamen.
1854 - Nicaragua; July 9 to 15. Naval forces bombarded and burned San Juan del Norte (Greytown) to avenge an insult to the American Minister to Nicaragua.
1855 - Uruguay; November 25 to 29. United States and European naval forces landed to protect American interests during an attempted revolution in Montevideo.
1857 - Nicaragua; April to May, November to December. United States Navy forces the surrender of William Walker, who had tried to seize control of the country.
1858 - Uruguay; January 2 to 27. Forces from two United States warships landed to protect American property during a revolution in Montevideo.
1859 - China; July 31 to August 2. A naval force landed to protect American interests in Shanghai.
1893 - Hawaii; January 16 to April 1. Marines were landed ostensibly to protect American lives and property, but with the real intention of promoting a provisional government under Sanford B. Dole and the overthrow of the Hawaiian Monarchy.
1894 - Nicaragua; July 6 to August 7. U.S. forces sought to protect American interests at Bluefields following a revolution.
1896 - Nicaragua; May 2 to 4. U.S. forces protected American interests in Corinto during political unrest.
1898 - Nicaragua; February 7 and 8. U.S. forces protected American lives and property at San Juan del Sur.
1898 - De Lôme Letter: In a private letter to a friend, Spanish minister wrote disparagingly of President William McKinley, letter stolen from Post Office in Havana and released by Cuban revolutionists.
1901 - Hay-Pauncefote Treaty. US reached agreement with British Foreign Minister nullifying Clayton-Bulwer Treaty of 1850 in return for guarantee of open passage for any nation through canal.
1901 - Platt Amendment, March 2. Cuba turned into a de facto protectorate of the United States, with provisions prohibiting said country from incurring in any debts or signing treaties with any country other than the United States, allowing further US military interventions, and setting up the Guantanamo Bay Naval Base. This situation would last until 1934.
1903 - Big Stick Diplomacy. Theodore Roosevelt refers to US policy as "speaking softly and carrying a big stick", applied the same year by assisting Panama's independence movement from Colombia. U.S. forces sought to protect American interests and lives during and following the Panamanian revolution over construction of the Isthmian Canal. With brief intermissions, United States Marines were stationed on the Isthmus from November 4, 1903, to January 21, 1914, to guard American interests.
1912-25 - Nicaragua; August to November 1912. U.S. forces protected American interests during an attempted revolution. A small force, serving as a legation guard and seeking to promote peace and stability, remained until August 5, 1925.
1912-41 - China. The disorders which began with the overthrow of the dynasty during Kuomintang rebellion in 1912, which were redirected by the invasion of China by Japan, led to demonstrations and landing parties for the protection of U.S. interests in China continuously and at many points from 1912 on to 1941. The guard at Peking and along the route to the sea was maintained until 1941. In 1927, the United States had 5,670 troops ashore in China and 44 naval vessels in its waters. In 1933, the United States had 3,027 armed men ashore. The protective action was generally based on treaties with China concluded from 1858 to 1901.
1915 - RMS Lusitania sunk off in the Irish coast by submarine under control of Captain Schweiger. The British passenger liner contained troops and ammunitions, as well as passengers. 128 Americans were killed.
1915-34 - Haiti. U.S. forces maintained order during a period of chronic political instability.
1916 - Pancho Villa raid into U.S.; punitive expedition chases Villa into Mexico; verge of war
1917 - Zimmerman Telegram proposes military alliance between Germany and Mexico against U.S. Publication outrages American opinion; Mexico rejects proposal.
1916-24 - Dominican Republic; American naval forces maintained order during a period of chronic and threatened insurrection.
1917 - U.S. Declares war on Germany and Austria (but not Turkey); stays independent of Britain and France
1917 - Lansing-Ishii Agreement. US recognized Japan's claim to special interests in China, particularly in contiguous territory. Objection to Japan assuming German Asian territories.
1924 - US led conference results in the Dawes Plan. Eased reparations for Germany and improvement of its economic situation.
1926-33 - Nicaragua; The coup d’etat of General Chamorro aroused revolutionary activities leading to the landing of American Marines intermittently until January 3, 1933.
1927 - Naval Disarmament Conference in Geneva; failure to agree
1927 - Clark memorandum repudiates Roosevelt Corollary to Monroe Doctrine
1928 - Kellogg-Briand Pact, multilateral treaty outlawing War by moral force of 60 signatory nations.
1929 - Young Plan reduces amount of reparations due from Germany to $8.0 billion over 58 years
1930 - Smoot Hawley Tariff. Rise of US tariffs; retaliation by Canada and others.
1931 - Stimson Doctrine U.S. will not recognize Japanese takeover of parts of China; policy endorsed by League of Nations
1932 - Lausanne Conference cancels 90% of reparations owed by Germany
1933 - "Good Neighbor Policy" announced at Montevideo Conference; no state has right to interve
1941 - Atlantic Charter. Conferences aboard warships in Placentia Bay off Argentia, Newfoundland between FDR and Winston Churchill resulted in (1) no territorial gains sought by US or UK, (2) territorial adjustments must conform to people involved, (3) people have right to choose their own govt. (4) trade barriers lowered, (5) there must be disarmament, (6) there must be freedom from want and fear (4 Freedoms of FDR), (7) there must be freedom of the seas, (8) there must be an association of nations.
1943 - Cairo Conference. FDR, Churchill and Chiang Kai-Shek of China meet to make decisions about postwar Asia: Japan returns all territory, independent Korea.
1943 - Casablanca Conference. FDR and Churchill meet to plan European strategy. Unconditional Surrender of Axis countries demanded, USSR aid and participation, invasion of Sicily and Italy planned.
1947-1991 - Beginning of the Cold War, referring to the period of tension and hostility between formerly allied nations after World War II, divided in two opposing blocks.
1947 - General Agreement on Tariffs and Trade. Signed in Geneva by 23 nations including the US, membership has since increased, for the purpose of eliminating trade barriers of all kinds on industrial and agricultural goods.
1947 - Marshall Plan. Reconstruction of Western European economies through loans under the auspice of the United States. Increased trade between Europe and the USA.
1948 - Berlin Blockade imposed on June 24 by the Soviet Union, blocking traffic into western sectors of Berlin, followed by Operation Vittles, US airlifted massive amounts of food, fuel and supplies into city. Soviet blockade lifted on May 12, 1949.
1949 - The United States along with eleven other nations signed the North Atlantic Treaty, creating NATO, a military alliance with the purpose of countering the USSR and its allies.
1950-53 - Korean War with the support of the United Nations. U.S. forces deployed in Korea exceeded 300,000 during the last year of the conflict.
1953 - Iran U.S. and British governments organize and give support to a coup against Prime Minister Mohammad Mosaddeq, after Iranian Oil Company is nationalized.
1954 - Guatemala. U.S. supports coup against the democratically-elected government of Jacobo Arbenz Guzmán for redistributing land held by U.S. business interests. Extensive propaganda campaign against said government.
1957 - Eisenhower Doctrine stated that the US would use armed force upon request of imminent or actual aggression, applied in Lebanon that year successfully.
1961 - Alliance for Progress. Agreement ostensibly created to "develop the resources of the hemisphere, strengthen the forces of democracy, and widen the vocational and educational opportunities within the Americas". Policy was aimed to counter the growing regional appeal of the Cuban revolution. Lowering support and eventual cancellation after Kennedy's death.
1962 - Cuban Missile Crisis. John F. Kennedy on October 22 announced that there existed Soviet missiles in Cuba and demanded their removal while imposing an air sea blockade. Nikita Khrushchev sent two letters, one belligerent one conciliatory to Kennedy, Kennedy ignores belligerent letter and missiles are withdrawn on condition that US won't invade Cuba. Kennedy demanded onsite inspection, which was not allowed.
1979-80 - Iran becomes an Islamic Republic after the overthrow of U.S.-backed Shah; militants seize 63 American diplomats for 444 days during the Iran hostage crisis; U.S. seizes $12 billion in Iranian assets; American rescue effort fails; on Jan 20, 1981 hostages and assets are freed.
1980-88 - Iran-Iraq War. U.S. officially neutral in war between Iraq and Iran; US flags oil tankers to protect flow of oil in Persian Gulf.
1991 - Gulf War; U.S. leads a UN-authorized coalition to repel an Iraqui invasion out of neighboring Kuwait.
1991-1993 - START accords between the United States and the Soviet Union (After 1991, Russia), both countries agree to limit the production, and reduce their stocks, of nuclear weapons and other types of ballistic weaponry.
1991-2003 - Iraq sanctions; U.S. and Britain maintain no-fly-zones in the north and south of Iraq with periodic bombings.
21st century
2003 - US-led coalition invades Iraq to overthrow Saddam Hussein. Troops remain to fight insurgency against the UN-approved elected government.
to be continued
Footnotes
Fursenko anfd Naftali, The Cuban missile crisis. p160.
References
Lester H Brune, Chronological History of U.S. Foreign Relations (2003), 1400 pages
Alexander Deconde, Richard Dean Burns, Fredrik Logevall, and Louise B. Ketz, eds. Encyclopedia of American Foreign Policy 3 vol (2001), 2200 pages; 120 long articles by specialists.
John E. Findling, ed. Dictionary of American Diplomatic History 2nd ed. 1989. 700pp; 1200 short articles.