 In 1762, after the French and Indian War, France secretly ceded New France to Spain, per the Treaty of Fontainebleau.In 1802, Spain returned most of the land to France, but keeping title to about 7,500 square miles.In 1803, most of the land for modern day Kansas was acquired by the United States from France as part of the 828,000 square mile Louisiana Purchase for 2.83 cents per acre.