Slavery in the colonial United States in the Caribbean: Guadeloupe and especially Saint-Domingue.) After the port of New Orleans was founded in 1718 with access to the Gulf Coast, French colonists imported more African slaves to the Illinois Country for use as agricultural or mining laborers. By the mid-eighteenth century, slaves accounted for as many as a third of the limited population in that rural area. Slavery was much more extensive in colonial Louisiana, where the French developed sugar cane plantations along the Mississippi river. Slavery was maintained during the French (1699 – 1763, and 1800 – 1803) and Spanish (1763 – 1800) periods of government.
History of St. Louis (1763–1803) Louisiana Purchase. The treaty was ratified by the U.S. Senate in November 1803, and the transfer of power from Spain was made official in St. Louis at a ceremony called Three Flags Day. On March 8, 1804, the flag of Spain was lowered at the government buildings in St. Louis and, according to local tradition, the flag of France was raised. On March 10, 1804, the French flag was replaced by the flag of the United States. History of St. Louis (1763–1803) The history of St. Louis, Missouri from 1763 to 1803 was marked by the transfer of French Louisiana