The Louisiana Purchase was the acquisition by the United States of more than 529,911,681 acres (827,987 mi² or 2,144,476 km2) of territory from France in 1803, at the cost of about 3¢ per acre (7¢ per hectare); $15 million or 80 million francs in total. (If adjusted for the relative share of GDP, this amount would equal approximately $390 billion in 2003 The relative value in U.S. Dollars - Economic History Services , or about $1800 per hectare.)
The French territory of Louisiana included far more land than just the current U.S. state of Louisiana. The lands purchased contained parts or all of present-day Arkansas, Missouri, Iowa, Minnesota west of the Mississippi River, North Dakota, South Dakota, Nebraska, New Mexico, northern Texas, Oklahoma, Kansas, the portions of Montana, Wyoming, and Colorado east of the Rocky Mountains, the portions of southern Manitoba, southern Saskatchewan and southern Alberta that drain into the Missouri River, and Louisiana on both sides of the Mississippi River including the city of New Orleans.
The land included in the Purchase comprises 22.3% of the territory of the modern United States.
The purchase was an important moment in the presidency of Thomas Jefferson. At the time, it faced domestic opposition as being possibly unconstitutional.
The city of New Orleans controlled the Mississippi River through its location; other locations for ports had been tried and had not succeeded. New Orleans was already important for shipping agricultural goods to and from the parts of the U.S. west of the Appalachian Mountains. Through Pinckney's Treaty signed with Spain on October 27, 1795, American merchants had "right of deposit" in New Orleans, meaning they could use the port to store goods for export. Americans also used this "right of deposit" to transport products such as flour, tobacco, pork, bacon, lard, feathers, cider, butter, and cheese. The treaty also recognized American rights to navigate the entire Mississippi River which had become increasingly vital to the growing trade of their western territories (Meinig 1993). In 1798, Spain revoked this treaty which greatly upset Americans. In 1801, Spanish Governor Don Juan Manuel de Salcedo took over for Governor Marquess of Casa Calvo and the right to deposit goods from the United States was restored.
Napoleon Bonaparte returned Louisiana to French control from Spain in 1800, under the Treaty of San Ildefonso (Louisiana had been a Spanish colony since 1762). However, this treaty was kept secret, and Louisiana would remain under Spanish control until a transfer of power to France that had yet to be organized. It finally took place on November 30, 1803, just three weeks before the cession to the U.S.
Americans were fearful that they would lose their rights of use to New Orleans. The Jefferson administration decided that the best way to assure long term access to the Mississippi would be to purchase the city of New Orleans and the nearby portions of Louisiana east of the Mississippi. Jefferson sent James Monroe and Robert R. Livingston to Paris to negotiate such a purchase. Their interest was only in the port, not in the broad swath of territory eventually included in the Louisiana Purchase which came as a surprise bonus.
In 1802, Pierre Samuel du Pont de Nemours was enlisted to help negotiate. Du Pont was living in the U.S. at the time and had close ties to Jefferson, as well as to the political powers in France. He engaged in back channel diplomacy with Napoleon, on Jefferson's behalf, during a personal visit to France. He originated the idea of the much larger Louisiana Purchase as a way to defuse potential conflict between the U.S. and Napoleon over North America. Duke, Marc; The du Ponts: Portrait of a Dynasty, P.77-83, Saturday Review Press, 1976
Jefferson disliked the idea: purchasing Louisiana from France would imply that France had a right to be in Louisiana. Jefferson also believed that Presidents did not have the authority to engage in such a deal because it was not specified in the constitution, and doing so would further erode states' rights by increasing Federal executive power. On the other hand, he was aware of the potential threat that a neighbor like France could be for the young nation, and was ready to go to war in case a strong French presence in the region was implemented. Talleyrand, likewise, was vehemently opposed to selling Louisiana, as it would mean an end to France's secret plans for a takeover of North America.
Throughout this time, Jefferson had up-to-date intelligence on Napoleon's military activities and intentions in North America. Part of his evolving strategy involved giving du Pont information that was withheld from Livingston. He also gave the intentionally conflicting instructions to the two. He next sent Monroe to Paris, in 1803, as Monroe had been formally expelled from France on his last diplomatic mission, and the choice to send him again conveyed a sense of seriousness.
Napoleon was faced with the defeat of his armies in Saint-Domingue (present-day Republic of Haiti) where an expeditionary force under his brother-in-law Charles Leclerc was attempting to reassert control over a slave rebellion that threatened France's most profitable colony.
Political conflicts in Guadeloupe and in Saint-Domingue itself grew with the restoration of slavery on 20 May,1802, and the defection of leading French officers, like the black general Jean-Jacques Dessalines and the mulatto officer Alexandre Pétion in October 1802, within the context of an ongoing guerrilla war. The French had successfully deported Toussaint L'Ouverture to France in June 1802, but yellow fever was destroying European soldiers and claimed Leclerc himself in November.
Lacking sufficient military forces in America, Napoleon needed peace with the United Kingdom of Great Britain and Ireland to implement the Treaty of San Ildefonso and take possession of Louisiana. Otherwise, Louisiana would be an easy prey for the British or even for the Americans. Britain had breached her promise to evacuate Malta by September 1802 as stipulated in the peace of Amiens, and in the beginning of the year 1803, war between France and Britain seemed increasingly unavoidable. On 11 March, 1803, Napoleon decided to start building a flotilla of barges to invade Britain.
These circumstances led Bonaparte to abandon his plans to rebuild France's New World empire. Napoleon gave notice to his business minister, François de Barbé-Marbois, on April 10, 1803 that he was considering surrendering the Louisiana Territory to the United States. On 11 April, 1803, just days before Monroe's arrival, Marquess de Barbé-Marbois, Napoleon's minister of the treasury, offered Livingston all of Louisiana instead of just New Orleans. President Jefferson had instructed Livingston to only purchase the Floridas. However, he was certain that the United States would accept such a large offer.
The American negotiators were prepared to spend $10 million for New Orleans, but were dumbfounded when the entire region was offered for $15 million ($190 million in 2003 dollars). The treaty was dated April 30, 1803 and was signed on May 2nd. On July 14, 1803 the treaty reached Washington D.C. The Louisiana territory was vast, stretching from the Gulf of Mexico in the south to Rupert's Land in the north, and from the Mississippi River in the east to the Rocky Mountains in the west. Acquiring the territory would double the size of the United States at a cost of less than 3 cents per acre ($7 per square kilometer).
The United States Senate ratified the treaty, with a vote of twenty-four to seven, on October 20; on the following day, it authorized President Jefferson to take possession of the territory and establish a temporary military government. In legislation enacted on October 31, Congress made temporary provisions for local civil government to continue as it had under French and Spanish rule and authorized the President to use military forces to maintain order. Plans were also set forth for a mission to explore and chart the territory, which would become known as the Lewis and Clark expedition.
France then turned New Orleans over to the United States on December 20, 1803. On March 10, 1804, a formal ceremony was conducted in St. Louis, to transfer ownership of the territory from France to the United States of America.
Effective on October 1, 1804, the purchased territory was organized into the Orleans Territory (most of which became the state of Louisiana) and the District of Louisiana, which was temporarily under the control of the Governor and Judges of the Indiana Territory.
In 1810, after a revolt in West Florida, the United States annexed the region between the Mississippi and Pearl rivers (known today as the Florida Parishes of Louisiana). In 1812, the Mobile District was annexed (the region between the Pearl and Perdido Rivers, which now forms the panhandles of Alabama and Mississippi). The matter was not fully settled until the signing of the Adams-Onís Treaty in 1819, in which Spain ceded all of Florida to the U.S. and the boundary between the Louisiana territory and the Spanish colonies was set along the Sabine, Red and Arkansas rivers and the 42nd parallel.
Estimates that did exist as to the extent and composition of the purchase were initially based on the explorations of Robert LaSalle.
If the United States owned all the tributaries of the Mississippi on its western side, the Purchase extended into Canada. This makes the above map inaccurate, as the purchase originally was found above near the 50th Parallel. However, these lands were ceded to the UK in 1818 in the Red River Cession.
The tributaries of the Mississippi were held as the boundaries.
Meinig, D.W. The Shaping of America: Volume 2, Yale University Press, 1993. ISBN 0-300-06290-7
History of Louisiana | History of United States expansionism | United States treaties
Louisiana Purchase | Louisiana Purchase | Compra de Luisiana | خرید لوئیزیانا | Vente de la Louisiane | 루이지애나 매입 | Accordo sulla Louisiana | רכישת לואיזיאנה | Louisiana Purchase | ルイジアナ買収 | Compra da Louisiana | Луизианская покупка | Louisianaköpet | 路易西安納購地
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