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Oregon boundary dispute
1
Oregon boundary dispute
The Oregon boundary dispute, or the
Oregon Question, arose as a result of
competing British and American claims to
the Pacific Northwest of North America in
the first half of the 19th century. Both the
United Kingdom (UK) and the United States
(USA) had territorial and commercial
aspirations in the region as well as residual
claims from treaties with Russia and
Spain.[1] The British knew the region as the
Columbia District, a fur-trading division of
the Hudson's Bay Company (HBC), while
Americans referred to it as the Oregon
Country. The broadest definition of the
disputed region was defined by the
following: west of the Continental Divide of
the Americas, north of the 42nd parallel
north (the northern border of New Spain and
after 1821 of Mexico), and south of the
parallel 54°40′ north (the southern border of
Russian America after 1825).
The Oregon Country/Columbia District
stretched from 42N to 54 40'N.The most heavily disputed portion is highlighted
The Oregon Dispute became important in geopolitical diplomacy between the British Empire and the new American
Republic. In 1844 the U.S. Democratic Party, appealing to expansionist sentiment and the popular theme of manifest
destiny, asserted that the U.S. had a valid claim to the entire Oregon Country up to Russian America at parallel
54°40′ north. Democratic presidential candidate James K. Polk won the 1844 election, but then sought a compromise
boundary along the 49th parallel, the same boundary proposed by previous U.S. administrations. Negotiations
between the U.S. and the British broke down, however, and tensions grew as American expansionists like U.S.
Senator Edward A. Hannegan of Indiana, or Congressman Leonard Henly Sims, Missouri, which urged Polk to
annex the entire Oregon Country north to the parallel 54°40′ north, as the Democrats had called for in the election.
The turmoil gave rise to slogans like "Fifty-four Forty or Fight!" and the catchphrase "Manifest Destiny".
The expansionist agenda of Polk and the Democratic Party created the possibility of two different, simultaneous
wars, because relations between the United States and Mexico were deteriorating following the annexation of Texas.
Neither Britain nor the United States really wanted to fight a third war in 70 years. Just before the outbreak of the
war with Mexico, Polk returned to his earlier position on the Oregon boundary and accepted a compromise along the
49th parallel as far as the Strait of Georgia. This agreement was made official in the 1846 Oregon Treaty, and the
49th parallel remains the boundary between the United States and Canada west of Lake of the Woods, other than the
marine boundary which curves south through the Haro Strait (settled over the Rosario Strait in 1872) to the Strait of
Juan de Fuca and so excludes from the United States Vancouver Island and the Gulf Islands. As a result, much of
Point Roberts (a small peninsula extending south into the Strait of Georgia from Canada) is an exclave of the United
States.
Oregon boundary dispute
2
Early British and American activity
George Vancouver explored Puget Sound in 1792. Vancouver claimed it for Great Britain on June 4, 1792, naming it
for one of his officers, Lieutenant Peter Puget. That year, on May 12, 1792, American merchant captain Robert Gray
found the mouth of the Columbia River, and became the first Westerner to enter the river. He named it for his ship,
the Columbia Rediviva.
The American overland Lewis and Clark expedition reached the mouth of the Columbia River in 1805 and built Fort
Clatsop, on the south side of the river, as a place to spend the winter of 1805–1806 and provision for the return trip.
North West Company explorer David Thompson extensively explored the Columbia River commencing in 1807.
While on his 1811 voyage down the entire length of the Columbia River, Thompson camped at the junction with the
Snake River on July 9, 1811. He erected a pole and a notice claiming the country for the United Kingdom and stating
the intention of the North West Company to build a trading post at the site. Thompson reached a partially
constructed Fort Astoria about two months after the ill-fated Tonquin's departure.
Fort Nez Perces was subsequently
constructed by the North West Company.
The American Pacific Fur Company
selected the more northerly Fort Okanogan
as the center for their inland operations. Fort
Astoria and all other Pacific Fur Company
posts were sold to the North West Company.
During the War of 1812, a rash action by the
commander of HMS Racoon "captured" the
fort, even though it was already under
British ownership. The resulting technicality
that it was returned to U.S. ownership as
part of the war's settlement as a result of the
Treaty of Ghent, even though no trading
activity was re-commenced.
By Article III of the Anglo-American
Convention of 1818 the United Kingdom
and the United States agreed to what has
since been described as "joint occupancy,"
deferring on any resolution of the territorial
and treaty disputes until a later time.
Map of the Columbia River and its tributaries, showing modern political
boundaries and cities.
The Hudson's Bay Company (HBC) merged with the North West Company in 1821. That same year, the U.K.
Parliament passed a statute requiring that the laws of Upper Canada be enforced by the HBC in Rupert's Land and
the Columbia District. The HBC's Pacific Headquarters at Fort Vancouver became the center of activity in the
Pacific Northwest.
The HBC held a license to trade with the populous aboriginal peoples of the region, and its network of trading posts
and routes extended southward from New Caledonia, another HBC fur-trade district, into the Columbia basin. The
HBC's headquarters for the entire region became established at Fort Vancouver (near today's Vancouver,
Washington) in 1824, which became the centre of a thriving colony of mixed origin, including Scottish Canadians
and Scots, English, French Canadians, Hawaiians, Algonkians and Iroquois, as well as the offspring of company
employees who had intermarried with various local native populations.
Oregon boundary dispute
Every year ships would come from London
and India, (via the Pacific) to drop off
supplies and trade goods in exchange for the
furs. It was also accessed from London
twice annually via Hudson Bay and the
York Factory Express trade route. Fort
Vancouver was the nexus for the fur trade
on the Pacific Coast; its influence reached
from Rupert's Land and the Rocky
Mountains in the east to the Hawaiian
Islands, and from Russian Alaska to
Mexican California. At its pinnacle in the
late 1830s and early 1840s, Fort Vancouver
watched over 34 outposts, 24 ports, six
ships, and 600 employees.
3
Map of the route of the York Factory Express, 1820s to 1840s. Modern political
boundaries shown.
Early American activity in the region included Fort William on present day Sauvie Island, the establishment of the
Methodist Mission in the Willamette Valley and the Whitman Mission east of the Cascades,[2] a saw mill in the
Willamette Valley partly owned by Ewing Young,[3] a grist mill also in the valley built in 1834,[4] the Willamette
Cattle Company organized in 1837 to bring over 600 head of cattle to the Willamette Valley, as well as ongoing
Maritime Fur Trade vessels.
Since the HBC officially discouraged settlement because it interfered with the lucrative fur trade, negotiations over
the decades failed to settle upon a compromise boundary along the Columbia River. Strained relationships grew
worse as American settlers began trickling into the region in the 1830s, and tensions escalated when settlers started
arriving in large numbers in the 1840s along the Oregon Trail.
Joint occupation
The dispute arose as a result of competing claims between the United States and the United Kingdom to the Oregon
Country, which consisted of what is now the Pacific Northwest of the United States and southern British Columbia,
Canada. Both nations claimed the region based on earlier exploration and the "right of discovery". Following long
European precedent, both sides recognized only limited sovereign rights of the indigenous population.
In 1818, diplomats of the two countries attempted to negotiate a boundary between the rival claims. The Americans
suggested dividing the Oregon Country along the 49th parallel, which was the border between the United States and
British North America east of the Rocky Mountains. British diplomats wanted a border further south along the
Columbia River, so as to maintain the North West Company"s (later the Hudson's Bay Company) control of the
lucrative fur trade along that river. As a compromise, the Anglo-American Convention of 1818 (or Treaty of 1818),
which settled most other disputes from the War of 1812, called for the joint occupation of the region for ten years.
As the expiration of the ten-year agreement approached, a second round of negotiations from 1825 to 1827 failed to
resolve the dispute, and so the joint occupation agreement was renewed, this time with the stipulation that a one-year
notice had to be given when either party intended to abrogate the agreement.
Early in the 1840s, negotiations that produced the 1842 Webster-Ashburton Treaty (a border settlement in the east)
addressed the Oregon question once again. British negotiators still pressed for the Columbia River boundary, which
the Americans would not accept since it would deny the U.S. an easily accessible deep water port on the Pacific
Ocean, and so no adjustment to the existing agreement was made. By this time, American settlers were steadily
pouring into the region along the Oregon Trail, a development that some observers—both British and
American—realized would eventually decide the outcome.
Oregon boundary dispute
4
The HBC belatedly reversed its policy on colonization. In 1841, on orders from HBC Governor Sir George Simpson,
James Sinclair guided nearly 200 settlers from the Red River Colony west in an attempt to retain the area for Britain.
In 1843, John C. Calhoun famously declared that the U.S. government should pursue a policy of "wise and masterly
inactivity" in Oregon, letting settlement determine the eventual boundary. That year over 700 U.S settlers arrived via
the Oregon Trail in the "Great Migration". The Provisional Government of Oregon was established that year. Many
of Calhoun's fellow Democrats, however, soon began to advocate a more direct approach.[5]
Election of 1844
Important figures in the Oregon question
United States
United Kingdom
James K. Polk
President
Robert Peel
Prime Minister
James Buchanan
Secretary of State
Earl of Aberdeen
Foreign Secretary
Louis McLane
Richard Pakenham
Minister to the UK Minister in Washington
At the 1844 Democratic National Convention, the party platform called for the annexation of Texas and asserted that
the United States had a "clear and unquestionable" claim to "the whole" of Oregon and "that no portion of the same
ought to be ceded to England or any other power." By informally tying the Oregon dispute to the more controversial
Texas debate, the Democrats appealed to both Northern expansionists, who were more adamant about the Oregon
boundary, and Southern expansionists, who focused on annexing Texas. Democratic candidate James K. Polk went
on to win a narrow victory over Whig candidate Henry Clay, in part because Clay had taken a stand against
expansion. "Fifty-four Forty or Fight!" was not yet coined during this election; one actual Democratic campaign
slogan from this election (used in Pennsylvania) was the more mundane "Polk, Dallas, and the Tariff of '42".[6]
In his March 1845 inaugural address, President Polk quoted from the party platform, saying that the U.S. title to
Oregon was "clear and unquestionable". Tensions grew, with both sides moving to strengthen border fortifications in
anticipation of war. Despite Polk's bold language, he was actually prepared to compromise, and had no real desire to
go to war over Oregon. He believed that a firm stance would compel the British to accept a resolution agreeable to
the United States, writing that "the only way to treat John Bull was to look him straight in the eye". But Polk's
position on Oregon was not mere posturing: he genuinely believed that the U.S. had a legitimate claim to the entire
region. He rejected British offers to settle the dispute through arbitration, fearing that no impartial third party could
be found.[7]
Prime Minister Robert Peel's Foreign Secretary, the Earl of Aberdeen, also had no intention of going to war over a
region that was of diminishing economic value to the United Kingdom. Furthermore, the United States was an
important trading partner. With the onset of famine in Ireland, the United Kingdom faced a food crisis, and had an
increasing need for American wheat. Aberdeen had already decided to accept the U.S. proposal for a boundary along
the 49th parallel, and he instructed Richard Pakenham, his minister in the U.S., to keep negotiations open.
On the other hand, Aberdeen and Pakenham were negotiating from a position of strength. The key was the
overwhelming naval power which Britain could have brought to bear against the United States, combined with a
diplomatic and political landscape that ultimately favored the British government's aim of protecting her interests
robustly but without resort to armed conflict. Local interests were protected by the 80-gun ship-of-the-line HMS
Collingwood under the CinC Rear Admiral Sir George Seymour. During the crisis his squadron was augmented by
HMS America (74 guns), under the command of Captain John Gordon (younger brother of the Foreign Secretary), an
officer whose misjudgement during the crisis – in contrast to Seymour’s exemplary behavior – led to his
Oregon boundary dispute
court-martial and reprimand.
Ultimately British politicians and naval officers recognized that any conflict over the Oregon boundary, however
undesirable, would be decided, like the War of 1812, on the Eastern Seaboard of the U.S. and the Great Lakes. It was
here that the full influence of British naval dominance could be brought to bear and it was this influence that played
most strongly upon American decision-making during the crisis, especially their decision to compromise. From
London, McLane reported that the British were prepared “to commission immediately some thirty ships-of-the-line
in addition to steamers and other vessels held in reserve.” Polk’s bluff had been called.
Against this background, skillful diplomacy by the Peel government offered Polk the chance to back down, which
was a course he accepted. A repeat of the War of 1812 was not on anyone’s agenda, and with no prospect of French
support over such a trivial point Polk had little choice.
Whilst the Hudson’s Bay Company gradually lost commercial dominance over Oregon, the company’s interests were
increasingly turning towards shipping which rendered the Columbia River less important than Vancouver Island.
Shipping and trade interests could be protected by the development of the Esquimalt naval base and RN squadron
based there.
Although the Royal Navy’s presence locally may not have been superior, vast overall superiority to the U.S. Navy
enabled Britain’s politicians to secure their central objective of defeating the wild assertions of American politicians,
retaining Vancouver island and avoiding a potentially costly, distracting war with a major trading partner at
seemingly small cost at a time when the European continental balance was a far more pressing problem.[8]
A complicating factor in the negotiations was the issue of navigation on the Columbia River. Polk's predecessor,
John Tyler, had offered the British unrestricted navigation on the river if they would accept a boundary along the
49th parallel. In the summer of 1845, the Polk administration renewed the proposal to divide Oregon along the 49th
parallel, but this time without conceding navigation rights. Because this proposal fell short of the Tyler
administration's earlier offer, Pakenham rejected the offer without first contacting London. Offended, Polk officially
withdrew the proposal on August 30, 1845 and broke off negotiations. Aberdeen censured Pakenham for this
diplomatic blunder, and attempted to renew the dialogue. By then, however, Polk was suspicious of British
intentions, and under increasing political pressure not to compromise. He declined to reopen negotiations.[9]
5
Oregon boundary dispute
Slogans and war crisis
Meanwhile, many newspaper editors in the United States clamoured for
Polk to claim the entire region as the Democrats had proposed in the
1844 campaign. Headlines like "The Whole of Oregon or None"
appeared in the press by November 1845. In a column in the New York
Morning News on December 27, 1845, editor John L. O'Sullivan argued
that the United States should claim all of Oregon "by the right of our
manifest destiny to overspread and to possess the whole of the
continent". Soon afterwards, the term "Manifest Destiny" became a
standard phrase for expansionists, and a permanent part of the American
lexicon. O'Sullivan's version of "Manifest Destiny" was not a call for
war, but such calls were soon forthcoming.
In his annual address to Congress on December 2, 1845, Polk
recommended giving the British the required one-year notice of the
termination of the joint occupation agreement. In Congress, Democratic
expansionists from the Midwest, led by Senators Lewis Cass of
Senator Lewis Cass was a leading advocate of
Michigan, Edward A. Hannegan of Indiana, and William Allen of Ohio,
54°40′, but backed away from the claim when
called for war with the United Kingdom rather than accepting anything
it became untenable. Like James Buchanan,
Cass had presidential ambitions and did not
short of all of Oregon up to Parallel 54°40′ north. (54°40′ was then the
want to alienate Americans on either side of
southern boundary of the Russian claim to Alaska.) The slogan
the Oregon question.
"Fifty-Four Forty or Fight" appeared by January 1846, driven in part by
the Democratic press. The phrase is frequently misidentified as a
campaign slogan from the election of 1844, even in many textbooks. Bartlett's Familiar Quotations attributes the
slogan to William Allen.[10]
The calls to war were fueled by a number of factors, including traditional distrust of the British and a belief that the
U.S. had the better claim and would make better use of the land. Moderates warned that the U.S. could not win a war
against the world's greatest power, and that negotiation could still achieve U.S. territorial goals. Although the debate
in the U.S. was not strictly divided along party or sectional lines, many who clamored for the 54°40′ border were
Northerners upset that Polk, a Southern slave owner, had been uncompromising in his pursuit of Texas, a cause
deemed favorable to Southern slave owners, but willing to compromise on Oregon. As historian David M. Pletcher
noted, "Fifty-Four Forty or Fight" seemed to be directed at the southern aristocracy in the U.S. as much as at the
United Kingdom.[11]
6
Oregon boundary dispute
7
Resolution and treaty
Although Polk had called on Congress in December 1845 to pass a
resolution notifying the British of the termination of joint occupancy
agreement, it was not until April 23, 1846 that both houses complied.
The passage was delayed (especially in the Senate) by contentious
debate, and ultimately a mild resolution was approved, the text of
which called on both governments to settle the matter amicably. By a
large margin, moderation had won out over calls for war. Unlike
Western Democrats, most Congressmen—like Polk—did not want to
fight for 54° 40′. [12]
The Oregon Territory, as established after the
The Polk administration then made it known that the British
Oregon Treaty, superimposed over the current
government should offer terms to settle the dispute. Time was of the
state boundaries.
essence, because it was well known that the Peel government would
fall with the impending repeal of the corn laws in the United Kingdom, and then negotiations would have to begin
again with a new ministry. Aberdeen and Louis McLane, the American minister in the United Kingdom, quickly
worked out a compromise and sent it to the United States. There, Pakenham and U.S. Secretary of State James
Buchanan drew up a formal treaty, known as the Oregon Treaty, which was ratified by the Senate on June 18, 1846
by a vote of 41–14. The border was set at the 49th parallel, the original U.S. proposal, with navigation rights on the
Columbia River granted to British subjects living in the area. Senator William Allen, one of the most outspoken
advocates of the 54° 40' claim, felt betrayed by Polk and resigned his chairmanship of the Foreign Relations
Committee.
The terms of the Oregon Treaty were essentially the same ones that had been offered earlier by the Tyler
administration, and thus represented a diplomatic victory for Polk. However, Polk has often been criticized for his
handling of the Oregon question. Historian Sam W. Haynes characterizes Polk's policy as "brinkmanship" which
"brought the United States perilously close to a needless and potentially disastrous conflict". David M. Pletcher notes
that while Polk's bellicose stance was the by-product of internal American politics, the war crisis was "largely of his
own creation" and might have been avoided "with more sophisticated diplomacy".[13]
Ambiguities in the wording of the Oregon Treaty regarding the route of the boundary, which was to follow "the
deepest channel" out to the Strait of Juan de Fuca and beyond to the open ocean resulted in the Pig War; another
boundary dispute in 1859 over the San Juan Islands. The dispute was peacefully resolved after a decade of
confrontation and military bluster during which the local British authorities consistently lobbied London to seize
back the Puget Sound region entirely, as the Americans were busy elsewhere with the Civil War. The San Juan's
dispute was not resolved until 1872; when the pursuant to the Treaty of Washington (1871) an arbitrator (the German
Emperor) chose the American-preferred marine boundary via Haro Strait, to the west of the islands, over the British
preference for Rosario Strait which lay to their east.
Upper Canada politicians and public, already angry with the Oregon Treaty, were once again upset that Britain had
not looked after their interests and sought greater autonomy in international affairs.
Oregon boundary dispute
8
Historical maps
The boundary between British and American territory was shown differently in maps at the time:
An 1841 American map showing
the 54°40′ line near Fort
Simpson as the boundary
An 1844 British
map showing the
Columbia River as
the boundary
An 1846 map showing
the 49th parallel as the
boundary through
Vancouver Island
An undated map
showing the detached
territory option
proposed by the British,
with the Olympic
Peninsula as part of the
US and the north bank
of the Columbia part of
the British Empire
Notes
[1] Mackie, Richard Somerset (1997). Trading Beyond the Mountains: The British Fur Trade on the Pacific 1793-1843. Vancouver: University
of British Columbia (UBC) Press. pp. 29, 124–126, 140. ISBN 0-7748-0613-3. online at Google Books (http:/ / books. google. com/
books?id=VKXgJw6K088C)
[2] Oregon History: Land-based Fur Trade and Exploration (http:/ / bluebook. state. or. us/ cultural/ history/ history06. htm)
[3] Ewing Young Route (http:/ / www. endoftheoregontrail. org/ oregontrails/ ewingyoung. html). compiled by Karen Bassett, Jim Renner, and
Joyce White.
[4] Salem Online History: Salem's Historic Figures (http:/ / www. salemhistory. net/ people/ historic_figures. htm)
[5] Pletcher, pp. 109–110. The phrase "wise and masterly inactivity", which Calhoun used more than once, originated with Sir James
Mackintosh. ( source (http:/ / www. bartleby. com/ 73/ 1038. html))
[6] Rosenboom, p. 132.
[7] Polk did not desire war, believed the Oregon claim: Haynes, p. 118. John Bull quote: Pletcher, p. 328. Rejects arbitration: Pletcher, p. 322.
[8] Gough, Barry M., The Royal Navy and the Northwest Coast of North America, 1810-1914 University of British Columbia Press, Vancouver.
1971. pp. 70-83
[9] Pletcher, pp. 237–249, 296–300; Haynes, pp. 118–120.
[10] Both Pletcher (p. 223) and Rosenboom (p. 132) note that the slogan was not used in the election. Pletcher also notes that many textbooks get
this wrong. See also E.A. Miles, "Fifty-Four Forty or Fight": an American Political Legend (http:/ / listserv. dom. edu/ cgi-bin/ wa.
exe?A2=ind0204& L=stumpers-l& T=0& P=31353), Mississippi Valley Historical Review 44(2), September 1957, pp. 291–309, and Hans
Sperber, "Fifty-four Forty or Fight": Facts and Fictions, American Speech 32(1), February 1957, pp. 5–11.
[11] Pletcher, pp. 335–37.
[12] Pletcher, pp. 351.
[13] Diplomatic victory for Polk, Haynes p. 136; brinkmanship, Haynes p. 194; Pletcher quote, p. 592.
References
• Haynes, Sam W. James K. Polk and the Expansionist Impulse. Arlington: University of Texas, 1997.
• Pletcher, David M. The Diplomacy of Annexation: Texas, Oregon, and the Mexican War. Columbia, Missouri:
University of Missouri Press, 1973.
• Rosenboom, Eugene H. A History of Presidential Elections: From George Washington to Richard M. Nixon.
Third edition. New York: Macmillan, 1970.
Oregon boundary dispute
Further reading
• Sir James Douglas, Chapter V The Oregon Boundary (http://www.nosracines.ca/page.aspx?id=607082&
amp;qryID=3e0b2f50-86b2-4a0a-9888-27c93e4a4a6d), Robert Hamilton Coats and R. Edward Gosnell, publ.
Morang, Toronto, 1908
External links
Party platform and speeches
• 1844 Democratic platform (http://www.presidency.ucsb.edu/showplatforms.php?platindex=D1844), which
asserted that the U.S. "title to the whole of the Territory of Oregon is clear and unquestionable"
• Polk's March 1845 inaugural address (http://www.presidency.ucsb.edu/ws/index.php?pid=25814), in which
he reasserted the "clear and unquestionable" claim
• Polk's December 1845 message to Congress (http://www.presidency.ucsb.edu/ws/index.php?pid=29486), in
which he called for the end of the joint occupation of Oregon
Political cartoons from Harper's Weekly, 1846
• "Polk's Dream" (http://loc.harpweek.com/LCPoliticalCartoons/IndexDisplayCartoonMedium.
asp?SourceIndex=Topics&IndexText=Oregon&UniqueID=9&Year=1846), in which the Devil, disguised as
Andrew Jackson, advises Polk to fight for the 54°40′ line
• "Present Presidential Position" (http://loc.harpweek.com/LCPoliticalCartoons/IndexDisplayCartoonMedium.
asp?SourceIndex=Topics&IndexText=Oregon&UniqueID=10&Year=1846), in which the Democratic Party's
"jackass" is standing on the 54°40′ line
• "Ultimatum on the Oregon Question" (http://loc.harpweek.com/LCPoliticalCartoons/DisplayCartoonMedium.
asp?MaxID=77&UniqueID=13&Year=1846&YearMark=1843), Polk talks with Queen Victoria, while others
make comments
• "War! or No War!" (http://loc.harpweek.com/LCPoliticalCartoons/IndexDisplayCartoonMedium.
asp?SourceIndex=Topics&IndexText=Oregon&UniqueID=15&Year=1846), two Irish immigrants face off over
the boundary question
Other
• Fifty-Four Forty or Fight (http://geography.about.com/library/weekly/aa031600a.htm) at About.com, an
example of a reference that mistakenly describes the phrase as an 1844 campaign slogan
• Another reference work (http://www.britannica.com/ebc/article-9375556) that mistakenly ascribes the slogan
Fifty-Four Forty or Fight to Polk is the Encyclopædia Britannica. URL last accessed December 16, 2005.
• 54-40 or Fight (http://earlywomenmasters.net/quilts/f/54_40/index.html) shows the quilt block named after
the slogan. In this time period, women frequently used quilts to express their political views.
9
Article Sources and Contributors
Article Sources and Contributors
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Image Sources, Licenses and Contributors
Image:Oregoncountry.png Source: http://en.wikipedia.org/w/index.php?title=File:Oregoncountry.png License: Creative Commons Attribution-Sharealike 2.5 Contributors: Closeapple,
Howcheng, Kmusser, Pixeltoo, Rmhermen, 2 anonymous edits
Image:Columbiarivermap.png Source: http://en.wikipedia.org/w/index.php?title=File:Columbiarivermap.png License: Creative Commons Attribution-Sharealike 3.0 Contributors: Kmusser
Image:York-Factory-Express.png Source: http://en.wikipedia.org/w/index.php?title=File:York-Factory-Express.png License: Creative Commons Attribution-Share Alike Contributors: Pfly
Image:LewisCass.jpg Source: http://en.wikipedia.org/w/index.php?title=File:LewisCass.jpg License: Public Domain Contributors: Original uploader was RickK at en.wikipedia
Image:Wpdms oregon territory 1848.png Source: http://en.wikipedia.org/w/index.php?title=File:Wpdms_oregon_territory_1848.png License: GNU Free Documentation License
Contributors: Matthew Trump
Image:1841 map of the Oregon Territory.jpg Source: http://en.wikipedia.org/w/index.php?title=File:1841_map_of_the_Oregon_Territory.jpg License: Public Domain Contributors: Badzil,
Flamarande, Roke, 1 anonymous edits
Image:Arrowsmith Oregon Country.jpg Source: http://en.wikipedia.org/w/index.php?title=File:Arrowsmith_Oregon_Country.jpg License: Public Domain Contributors: John Arrowsmith
(1780 – 1873)
Image:1846 Oregon territory.jpg Source: http://en.wikipedia.org/w/index.php?title=File:1846_Oregon_territory.jpg License: Public Domain Contributors: Clindberg, Denelson83,
Flamarande, Lumu, Roke, Yann, 1 anonymous edits
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