Philippe R. Girard
Haiti (known as Saint-Domingue until it gained its independence from France in 1804) had a noted economic and political impact on the United States during the era of the American Revolution, when it forced U.S. statesmen to confront issues they had generally avoided, most prominently racism and slavery. But the impact of the Haitian Revolution was most tangible in areas like commerce, territorial expansion, and diplomacy. Saint-Domingue served as a staging ground for the French military and navy during the American Revolution and provided troops to the siege of Savannah in 1779. It became the United States’ second-largest commercial partner during the 1780s and 1790s. After Saint-Domingue’s slaves revolted in 1791, many of its inhabitants found refuge in the United States, most notably in Philadelphia, Charleston, and New Orleans. Fears (or hopes) that the slave revolt would spread to the United States were prevalent in public opinion. As Saint-Domingue achieved quasi-autonomous status under the leadership of Toussaint Louverture, it occupied a central place in the diplomacy of John Adams and Thomas Jefferson. The Louisiana Purchase was made possible in part by the failure of a French expedition to Saint-Domingue in 1802–1803. Bilateral trade declined after Saint-Domingue acquired its independence from France in 1804 (after which Saint-Domingue became known as Haiti), but Haiti continued to loom large in the African-American imagination, and there were several attempts to use Haiti as a haven for U.S. freedmen. The U.S. diplomatic recognition of Haiti also served as a reference point for antebellum debates on slavery, the slave trade, and the status of free people of color in the United States.
Sarah B. Snyder
In its formulation of foreign policy, the United States takes account of many priorities and factors, including national security concerns, economic interests, and alliance relationships. An additional factor with significance that has risen and fallen over time is human rights, or more specifically violations of human rights. The extent to which the United States should consider such abuses or seek to moderate them has been and continues to be the subject of considerable debate.
Post-1945 immigration to the United States differed fairly dramatically from America’s earlier 20th- and 19th-century immigration patterns, most notably in the dramatic rise in numbers of immigrants from Asia. Beginning in the late 19th century, the U.S. government took steps to bar immigration from Asia. The establishment of the national origins quota system in the 1924 Immigration Act narrowed the entryway for eastern and central Europeans, making western Europe the dominant source of immigrants. These policies shaped the racial and ethnic profile of the American population before 1945. Signs of change began to occur during and after World War II. The recruitment of temporary agricultural workers from Mexico led to an influx of Mexicans, and the repeal of Asian exclusion laws opened the door for Asian immigrants. Responding to complex international politics during the Cold War, the United States also formulated a series of refugee policies, admitting refugees from Europe, the western hemisphere, and later Southeast Asia. The movement of people to the United States increased drastically after 1965, when immigration reform ended the national origins quota system. The intricate and intriguing history of U.S. immigration after 1945 thus demonstrates how the United States related to a fast-changing world, its less restrictive immigration policies increasing the fluidity of the American population, with a substantial impact on American identity and domestic policy.
Justus D. Doenecke
This is an advance summary of a forthcoming article in the Oxford Research Encyclopedia of American History. Please check back later for the full article.
For the United States, isolationism is best defined as avoidance of wars outside the Western Hemisphere, particularly in Europe; opposition to binding military alliances; and the preservation of national autonomy. Until the controversy over American entry into the League of Nations, isolationism was never subject to debate. The United States could expand its territory, protect its commerce, and even fight foreign powers without violating its traditional tenets. Once President Woodrow Wilson sought membership in the League, however, Americans saw isolationism as a foreign policy option, not simply something taken for granted. Its high point came between 1934 and 1937, when Congress, noting the challenge totalitarian nations posed to the international status quo, passed the Neutrality Acts to insulate the country from global entanglements.
Once World War II broke out in Europe, President Franklin D. Roosevelt increasingly sought American participation on the side of the Allies. Isolationists unsuccessfully fought FDR’s legislative proposals, beginning with the repeal of the arms embargo and ending with the convoying of supplies to Britain. The America First Committee (1940–1941), however, so mobilized anti-interventionist opinion as to make the president more cautious in his diplomacy.
If the Japanese attack on Pearl Harbor permanently ended classic isolationism, by 1945 a “new isolationism” voiced suspicion of the United Nations, the Truman Doctrine, aid to Greece and Turkey, the Marshall Plan, the North Atlantic Treaty Organization, and U.S. participation in the Korean War. Yet, because the “new isolationists” increasingly advocated militant unilateral measures to confront Communist Russia and China, often doing so to advance the fortunes of the Republican Party, they exposed themselves to charges of inconsistency. Since the 1950s, many Americans have opposed various military involvements—including Vietnam, Iraq, and Afghanistan—but few envision a return to an era in which the United States avoids all commitments.
James I. Matray
On June 25, 1950, North Korea’s invasion of South Korea ignited a conventional war that had origins dating from at least the end of World War II. In April 1945, President Harry S. Truman abandoned a trusteeship plan for postwar Korea in favor of seeking unilateral U.S. occupation of the peninsula after an atomic attack forced Japan’s prompt surrender. Soviet entry into the Pacific war led to a last minute agreement dividing Korea at the 38th parallel into zones of occupation. Two Koreas emerged after Soviet-American negotiations failed to agree on a plan to end the division. Kim Il Sung in the north and Syngman Rhee in the south both were determined to reunite Korea, instigating major military clashes at the parallel in the summer of 1949. Moscow and Washington opposed their clients’ invasion plans until April 1950 when Kim persuaded Soviet Premier Joseph Stalin that with mass support in South Korea, he would achieve a quick victory.
At first, Truman hoped that South Korea could defend itself with more military equipment and U.S. air support. Commitment of U.S. ground forces came after General Douglas MacArthur, U.S. occupation commander in Japan, visited the front and advised that the South Koreans could not halt the advance. Overconfident U.S. soldiers would sustain defeat as well, retreating to the Pusan Perimeter, a rectangular area in the southeast corner of the peninsula. On September 15, MacArthur staged a risky amphibious landing at Inchon behind enemy lines that sent Communist forces fleeing back into North Korea. The People’s Republic of China viewed the U.S. offensive for reunification that followed as a threat to its security and prestige. In late November, Chinese “volunteers” attacked in mass. After a chaotic retreat, U.S. forces counterattacked in February 1951 and moved the line of battle just north of the parallel. After two Chinese offensives failed, negotiations to end the war began in July 1951, but stalemated in May 1952 over the issue of repatriation of prisoners of war. Peace came because of Stalin’s death in March 1953, rather than President Dwight D. Eisenhower’s veiled threat to stage nuclear strikes against China.
Scholars have disagreed about many issues surrounding the Korean War, but the most important debate continues to center on whether the conflict had international or domestic origins. Initially, historians relied mainly on U.S. government publications to write accounts that ignored events prior to North Korea’s attack, endorsing an orthodox interpretation assigning blame to the Soviet Union and applauding the U.S. response. Declassification of U.S. government documents and presidential papers during the 1970s led to the publication of studies assigning considerable responsibility to the United States for helping to create a kind of war in Korea before June 1950. Moreover, left revisionist writers labeled the conflict a classic civil war. Release of Chinese and Soviet sources after 1989 established that Stalin and Chinese leader Mao Zedong approved the North Korean invasion, prompting right revisionist scholars to reassert key orthodox arguments. This essay describes how and why recent access to Communist documents has not settled the disagreements among historians about the causes, course, and consequences of the Korean War.
The impact of LGBTQ (lesbian, gay, bisexual, transgender, and queer) issues on U.S. foreign relations is an understudied area, and only a handful of historians have addressed these issues in articles and books. Encounters with unexpected and condemnable (to European eyes) sexual behaviors and gender comportment arose from the first European forays into North America. As such, subduing heterodox sexual and gender expression has always been part of the colonizing endeavor in the so-called New World, tied in with the mission of civilizing and Christianizing the indigenous peoples that was so central to the forging of the United States and pressing its territorial expansion across the continent. These same impulses accompanied the further U.S. accumulation of territory across the Pacific and the Caribbean in the late 19th century, and they persisted even longer and further afield in its citizens’ missionary endeavors across the globe. During the 20th century, as the state’s foreign policy apparatus grew in size and scope, so too did the notions of homosexuality and transgender identity solidify as widely recognizable identity categories in the United States. Thus, it is during the 20th and 21st centuries, with ever greater intensity as the decades progressed, that one finds important influences of homosexuality and gender diversity on U.S. foreign policy: in immigration policies dating back to the late 19th century, in the Lavender Scare that plagued the State Department during the Truman and Eisenhower presidencies, in more contemporary battles between religious conservatives and queer rights activists that have at times been exported to other countries, and in the increasing intersections of LGBTQ rights issues and the War on Terror that has been waged primarily in the Middle East since September 11, 2001.
Jennifer M. Spear
This is an advance summary of a forthcoming article in the Oxford Research Encyclopedia of American History. Please check back later for the full article.
On December 20, 1803, residents of New Orleans gathered at the Place d’Armes in the city center to watch as the French flag was lowered and the flag of the United States was raised in its place. Toasts were made to the U.S. president, the French first consul, and the Spanish king (whose flag had been lowered in a similar ceremony just twenty days earlier), and the celebrations continued throughout the night. The following day, however, began the process of determining just what it meant now that Louisiana was a part of the United States, initiating the first great test of the ability of the United States to expand its borders and incorporate both territories and peoples. The treaty ratifying the transfer, signed in Paris the previous April 30th, promised that “the inhabitants of the ceded territory shall be incorporated in the Union of the United States,” where they would experience “the enjoyment of all these rights, advantages and immunities of citizens of the United States.” These inhabitants included thousands of people of French and Spanish descent, several thousand slaves of African descent, and about fifteen hundred free people of at least partial African ancestry; most of these inhabitants spoke French or Spanish and practiced Catholicism. In addition, the territory was home to tens of thousands of indigenous peoples, many of whom still lived on traditional territories and under their own sovereignty. For a few inhabitants of the Louisiana territory, incorporation did lead to “the enjoyment of all these rights” and gave some small grain of truth to Jefferson's hope that the trans-Mississippi region would undergird the United States as an “empire of liberty,” although even for Europeans of French and Spanish ancestry, the process was neither easy nor uncontested. For most, however, incorporation led to the expansion of the United States as an empire of slavery, one built upon the violent dispossession of native peoples of their lands and the expropriated labor of enslaved peoples of African descent.
Luke A. Nichter
Assessments of President Richard Nixon’s foreign policy continue to evolve as scholars tap new possibilities for research. Due to the long wait before national security records are declassified by the National Archives and made available to researchers and the public, only in recent decades has the excavation of the Nixon administration’s engagement with the world started to become well documented. As more records are released by the National Archives (including potentially 700 hours of Nixon’s secret White House tapes that remain closed), scholarly understanding of the Nixon presidency is likely to continue changing. Thus far, historians have pointed to four major legacies of Nixon’s foreign policy: tendencies to use American muscle abroad on a more realistic scale, to reorient the focus of American foreign policy to the Pacific, to reduce the chance that the Cold War could turn hot, and, inadvertently, to contribute to the later rise of Ronald Reagan and the Republican right wing—many of whom had been part of Nixon’s “silent majority.” While earlier works focused primarily on subjects like Vietnam, China, and the Soviet Union, the historiography today is much more diverse – now there is at least one work covering most major aspects of Nixon’s foreign policy.
The development of military arms harnessing nuclear energy for mass destruction has inspired continual efforts to control them. Since 1945, the United States, the Soviet Union, the United Kingdom, France, the People’s Republic of China (PRC), Israel, India, Pakistan, North Korea, and South Africa acquired control over these powerful weapons, though Pretoria dismantled its small cache in 1989 and Russia inherited the Soviet arsenal in 1996. Throughout this period, Washington sought to limit its nuclear forces in tandem with those of Moscow, prevent new states from fielding them, discourage their military use, and even permit their eventual abolition.
Scholars disagree about what explains the United States’ distinct approach to nuclear arms control. The history of U.S. nuclear policy treats intellectual theories and cultural attitudes alongside technical advances and strategic implications. The central debate is one of structure versus agency: whether the weapons’ sheer power, or historical actors’ attitudes toward that power, drove nuclear arms control. Among those who emphasize political responsibility, there are two further disagreements: (1) the relative influence of domestic protest, culture, and politics; and (2) whether U.S. nuclear arms control aimed first at securing the peace by regulating global nuclear forces or at bolstering American influence in the world.
The intensity of nuclear arms control efforts tended to rise or fall with the likelihood of nuclear war. Harry Truman’s faith in the country’s monopoly on nuclear weapons caused him to sabotage early initiatives, while Dwight Eisenhower’s belief in nuclear deterrence led in a similar direction. Fears of a U.S.-Soviet thermonuclear exchange mounted in the late 1950s, stoked by atmospheric nuclear testing and widespread radioactive fallout, which stirred protest movements and diplomatic initiatives. The spread of nuclear weapons to new states motivated U.S. presidents (John Kennedy in the vanguard) to mount a concerted campaign against “proliferation,” climaxing with the 1968 Treaty on the Non-Proliferation of Nuclear Weapons (NPT). Richard Nixon was exceptional. His reasons for signing the Strategic Arms Limitation Treaty (SALT I) and Anti-Ballistic Missile Treaty (ABM) with Moscow in 1972 were strategic: to buttress the country’s geopolitical position as U.S. armed forces withdrew from Southeast Asia. The rise of protest movements and Soviet economic difficulties after Ronald Reagan entered the Oval Office brought about two more landmark U.S.-Soviet accords—the 1987 Intermediate Ballistic Missile Treaty (INF) and the 1991 Strategic Arms Reduction Treaty (START)—the first occasions on which the superpowers eliminated nuclear weapons through treaty. The country’s attention swung to proliferation after the Soviet collapse in December 1991, as failed states, regional disputes, and non-state actors grew more prominent. Although controversies over Iraq, North Korea, and Iran’s nuclear programs have since erupted, Washington and Moscow continued to reduce their arsenals and refine their nuclear doctrines even as President Barack Obama proclaimed his support for a nuclear-free world.
Jessica M. Chapman
The origins of the Vietnam War can be traced to France’s colonization of Indochina in the late 1880s. The Viet Minh, led by Ho Chi Minh, emerged as the dominant anti-colonial movement by the end of World War II, though Viet Minh leaders encountered difficulties as they tried to consolidate their power on the eve of the First Indochina War against France. While that war was, initially, a war of decolonization, it became a central battleground of the Cold War by 1950. The lines of future conflict were drawn that year when the Peoples Republic of China and the Soviet Union recognized and provided aid to the Democratic Republic of Vietnam in Hanoi, followed almost immediately by Washington’s recognition of the State of Vietnam in Saigon. From that point on, American involvement in Vietnam was most often explained in terms of the Domino Theory, articulated by President Dwight D. Eisenhower on the eve of the Geneva Conference of 1954. The Franco-Viet Minh ceasefire reached at Geneva divided Vietnam in two at the 17th parallel, with countrywide reunification elections slated for the summer of 1956. However, the United States and its client, Ngo Dinh Diem, refused to participate in talks preparatory to those elections, preferring instead to build South Vietnam as a non-communist bastion. While the Vietnamese communist party, known as the Vietnam Worker’s Party in Hanoi, initially hoped to reunify the country by peaceful means, it reached the conclusion by 1959 that violent revolution would be necessary to bring down the “American imperialists and their lackeys.” In 1960, the party formed the National Liberation Front for Vietnam and, following Diem’s assassination in 1963, passed a resolution to wage all-out war in the south in an effort to claim victory before the United States committed combat troops. After President John F. Kennedy took office in 1961, he responded to deteriorating conditions in South Vietnam by militarizing the American commitment, though he stopped short of introducing dedicated ground troops. After Diem and Kennedy were assassinated in quick succession in November 1963, Lyndon Baines Johnson took office determined to avoid defeat in Vietnam, but hoping to prevent the issue from interfering with his domestic political agenda. As the situation in South Vietnam became more dire, LBJ found himself unable to maintain the middle-of-the-road approach that Kennedy had pursued. Forced to choose between escalation and withdrawal, he chose the former in March 1965 by launching a sustained campaign of aerial bombardment, coupled with the introduction of the first officially designated U.S. combat forces to Vietnam.