 The Treaty of Fontainebleau (1762) was signed between France and Spain and ownership of the Louisiana territory west of the Mississippi River was transferred to the Spanish crown as a result of the Seven Years' War and Craighead County became a Spanish possession.Spain controlled of the territory encompassing the county until October 1, 1800 when Napoleon Bonaparte forced Spain to return the lost territories to France under the Treaty of Ildefonso.Napoleon maintained grandiose plans to establish a vast French Empire in Louisiana but the Royal Navy prevented him from transferring troops or settlers to the acquired territories.