Why did Napoleon’s expedition to Saint-Domingue fail?

The short answer

• A constitution that alarmed Paris. Toussaint’s constitution of 1801, his rule over the whole island and his trade with Britain and the United States made Napoleon fear that France would lose its richest colony. Napoleon also wanted the plantation economy restored to pay for his ambitions, and planters in Paris pressed him to act. The expedition followed directly from a colony that governed itself while still calling itself French.
• Peace in Europe freed France to act. The preliminary peace with Britain in October 1801 meant the French navy could cross the Atlantic without being intercepted. Napoleon used the pause in European war to send one of the largest fleets France had ever dispatched overseas. When war with Britain resumed in May 1803, that advantage vanished, and the British blockade then starved the French garrisons of men and supplies.
• A plan to disarm the colony. Leclerc’s orders aimed to disarm the Black army and deport its leaders, and every step toward that goal confirmed suspicions. The seizure of Toussaint in June 1802, after he had made peace, showed that French guarantees were worthless. Officers who had submitted watched the disarmament of their soldiers and drew the obvious conclusion. Distrust turned a defeated army back into a revolutionary one.
• Divisions inside Saint-Domingue. The expedition succeeded at first partly because the colony was divided. André Rigaud and Alexandre Pétion, defeated in the War of Knives, their civil war against Toussaint in 1799–1800, sailed with Leclerc; many cultivators had resented Toussaint’s labour code; and some officers calculated that France would win. Only when French policy threatened everyone’s freedom did these groups unite. Their reunion at Arcahaie in May 1803 marked the end of the divisions that had given France its opening.

What it changed

Independence is declared. With the French gone, the generals gathered at Gonaïves on 1 January 1804 and declared the country independent under the name Haiti, taken from the Taíno, the island’s first Indigenous inhabitants. Dessalines became governor-general for life, and the new state set out to define who its citizens were and how they would be protected from a French return, the story of the next chapter. The new name itself announced that the colony was gone.

Napoleon abandons the Americas. As the expedition failed, Napoleon gave up his plans for an American empire. In April 1803 he sold Louisiana to the United States for 15 million dollars, more than doubling the size of the young republic. The revolution in Saint-Domingue thus reshaped North America, although the United States would refuse to recognise Haiti for almost sixty years. Haiti’s victory thus helped make the modern United States that shunned it.

A war remembered as extermination. Rochambeau’s killings, the drownings and the dogs left a memory of a war of extermination, and Haitian leaders feared that France would return to finish it. That fear, and the experience of 1802–03, shaped the policies of the new state toward the French who remained, including the killings of 1804 that the next chapter treats as a memorial. Memories of the war shaped Haitian politics for generations.