Webster-Ashburton Treaty

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Webster-Ashburton Treaty,

Aug., 1842, agreement concluded by the United States, represented by Secretary of State Daniel Webster, and Great Britain, represented by Alexander Baring, 1st Baron Ashburton. The treaty settled the Northeast Boundary DisputeNortheast Boundary Dispute,
controversy between the United States and Great Britain concerning the Maine–New Brunswick boundary. The treaty of 1783 ending the American Revolution had described the northeastern boundary of the United States as running due north from the
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, which had caused serious conflicts, such as the Aroostook WarAroostook War,
Feb.–May, 1839, border conflict between the United States and Canada. In 1838, Maine and New Brunswick both claimed territory left undetermined on the U.S.-Canadian border, including the valley of the Aroostook River.
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. Over 7,000 sq mi (18,100 sq km) of the disputed area, including the Aroostook valley, were given to the United States, and several waterways, including the St. Johns River, were opened to free navigation by both countries. The Webster-Ashburton Treaty also settled the disputed position of the U.S.-Canada border in the Great Lakes region. Other clauses provided for cooperation in the suppression of the slave trade and for mutual extradition of criminals. Some disputes between the United States and Britain, notably the one concerning the Oregon boundary, were ignored. The treaty, however, served as a precedent in peaceful settlements of disputes between the two countries.


See H. S. Burrage, Maine in the Northeastern Boundary Dispute (1919) and H. Jones, To the Webster-Ashburton Treaty (1977).

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The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.

Webster-Ashburton Treaty


a treaty between the USA and Great Britain, signed in Washington, D.C., on Aug. 9, 1842, by D. Webster, US secretary of state, and Lord Ashburton, a British special envoy. The pact settled a number of disputed issues regarding the boundary between the USA and British possessions in Canada; it also called for the sides to cooperate in maritime supervision of compliance with the ban on the export of slaves from Africa.


British and Foreign Papers, vol. 30, pp. 360–67.
The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.
References in periodicals archive ?
In 1842, the United States and Canada resolved a border dispute by signing the Webster-Ashburton Treaty.
Marston discusses the Webster-Ashburton Treaty which provided for specific classes of judges to issue warrants for the apprehension of people requested for extradition.
Marys River remained unsettled until the conclusion of the Webster-Ashburton Treaty in 1842.
(5 Wheat.) 153, 162 (1820) (upholding conviction for piracy, as defined by the law of nations); Treaty to Settle and Define the Boundaries Between the Territories of the United States and the Possessions of Her Britannic Majesty in North America; For the Final Suppression of the African Slave Trade; and For the Giving Up of Criminals, Fugitive from Justice in Certain Cases (Webster-Ashburton Treaty), Aug.
His topics include the absence of an effective treaty, the Webster-Ashburton Treaty in effect during the Civil War, the death and resurrection of extradition during the Cold War and through the Vietnam War to the case of Leonard Peltier, The Canadian Extradition Act of 1999 and its impact on the existing treaty, and terrorism.
The Webster-Ashburton Treaty may turn up on the AP test, and a teacher who leaves it out of the curriculum will reduce the chances of his or her students' passing the test.
However, the Court noted that the instant matter was governed by the United States-Great Britain Webster-Ashburton Treaty,(79) which did create a duty to extradite, and that the matter before the court was one of treaty interpretation.(80)
This detailed study of Anglo-American political and diplomatic affairs from 1837 to 1846 argues that the tangled forces and negotiations behind the Webster-Ashburton Treaty of 1842 and the Oregon Treaty of 1846 were a necessary prologue to American continental expansion.
In sharp contrast to the relationship between the United States and Mexico, Canada and the United States have a long history of cooperation, which includes the mutual extradition of fugitives.(108) When Canada gained its independence in 1867,(109) it succeeded to the Webster-Ashburton Treaty,(110) then in force between the United States and Great Britain.
In North America, the Webster-Ashburton Treaty, signed on August 9, 1842, settled the Canadian-American boundary from the Atlantic to the Rocky Mountains at the position it stands today.
The issue was settled in 1842 by the Webster-Ashburton Treaty.
But the two stood together on the French Spoilation Claims, the Maine boundary, the Webster-Ashburton Treaty, the Caroline and Creole affairs, the McLeod case and, always, in defense of Andrew Jackson.