When Jefferson became president, peace was pending in Europe and he could look forward to disentangling the nation from the vices and alliances of foreign politics. "Peace is my passion," he repeatedly affirmed. Yet he was no pacifist. One of his first executive acts was to send a naval squadron to the Mediterranean to enforce peace without tribute on the piratical Barbary states. The Tripolitan War, as it was called, met with partial success: a treaty with Tripoli in 1805.
Far more important, of course, was the burgeoning crisis on the Mississippi, which would end in the triumph of the Louisiana Purchase. By the secret Treaty of San Ildefonso in October 1800, as Jefferson learned six months later, Spain ceded the great province of Louisiana (Jefferson suspected the Floridas as well) to France, conditional on an Italian throne for the duke of Parma, Charles IV's brother-in-law. The retrocession of Louisiana, which France had lost in 1763, announced the revival under Napoleonic auspices of old French dreams of empire in the New World. Over the years the United States had worked out an accommodation with Spain on the Mississippi. The Pinckney Treaty (or Treaty of San Lorenzo) of 1795 granted the Americans free navigation of the river through Spanish territory to the mouth, together with the privilege of deposit and reshipment of goods at New Orleans. This was an enormous, indeed essential, boon to western development. American trade at New Orleans dwarfed that of the Spanish.
Spain was a weak and declining power, and given the pace of American expansion across the continent, Jefferson confidently expected that the river, the Floridas, and Louisiana would all fall to the Americans in due time. But Louisiana in the hands of France was another matter. In Napoleon's grand design, Louisiana and the Floridas would provide the necessary economic and strategic support for an overseas empire centered on St. Domingue (Hispaniola), the richest of the French colonies, then in the control of rebel blacks led by Toussaint L'Ouverture. The reconquest of the island was therefore the first step toward realizing the design. This would not be short work, as Jefferson recognized.
Considering all the difficulties and imponderables of Napoleon's plan, the president made as little noise as possible, kept his patience, and put Louisiana in the track of diplomacy. His strategy was one of delay and maneuver improvised to meet events as they unfolded. His first and minimal concern was to ensure that if France did actually come into power at New Orleans, Americans in the West would be accorded the same commercial rights and privileges as under the Spanish. In Washington the secretary of state constantly drummed into the French envoy the grave danger to his country of making enemies of the American people on the Mississippi issue; and the envoy, Louis Pichon, transmitted these perturbations to Paris. In Paris the American minister, Robert R. Livingston, composed a memoir setting forth in detail the great American interest in Louisiana and the Floridas. He was unheeded and unheard, however. "There never was a government in which less could be done by negotiation than here," he wrote home. "There is no people, no Legislature, no councillors—One man is everything."
In April 1802, Jefferson decided it was time to strike out on a bold new course. Through the good offices of a mutual friend, Pierre-Samuel du Pont de Nemours, who was returning to France, Jefferson gave stern warning to Napoleon:
There is on the globe one single spot, the possessor of which is our natural and habitual enemy. It is New Orleans, through which the produce of three-eighths of our territory must pass to market, and from its fertility it will ere long yield more than half of our whole produce, and contain more than half our inhabitants.. . . The day that France takes possession of New Orleans fixes the sentence which is to restrain her forever within her low water mark. It seals the union of two nations who in conjunction can maintain exclusive possession of the ocean. From that moment we must marry ourselves to the British fleet and nation.
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