History of St. Louis (1763–1803) History of St. Louis (1763–1803) The history of St. Louis, Missouri from 1763 to 1803 was marked by the transfer of French Louisiana to Spanish control, the founding of the city of St. Louis, its slow growth and role in the American Revolution under the rule of the Spanish, the transfer of the area to American control in the Louisiana Purchase, and its steady growth and prominence since then. In mid-1763, French Governor Jean-Jacques Blaise d'Abbadie granted a trade monopoly over the west upper Mississippi region to Gilbert Antoine de St. Maxent, a New Orleans merchant. Maxent quickly engaged the
France in the Seven Years' War to suffer defeats throughout 1762 eventually forcing them to sue for peace. The 1763 Treaty of Paris confirmed the loss of French possessions in North America and Asia to the British. France also finished the war with very heavy debts, which they struggled to repay for the remainder of the 18th century. The previous major conflict in Europe, the War of the Austrian Succession, ended in 1748 with the Treaty of Aix-la-Chapelle. This peace agreement was very unpopular with the French populace who saw the terms as excessively lenient to France's enemies, specifically Britain and the Dutch Republic, and many