when did denmark lose schleswig and holstein to prussia
History of Schleswig-Holstein In March 1848 these differences led to an open uprising by the German-minded Estate assemblies in the duchies in support of independence from Denmark and of close association with the German Confederation. The military intervention of Prussia helped the uprising: the Prussian army drove Denmark's troops from Schleswig and Holstein.
Economic history of Germany From the 1830s and 1840s, Prussia, Saxony, and other states reorganized agriculture, introducing sugar beets, turnips, and potatoes, yielding a higher level of food production that enabled a surplus rural population to move to industrial areas. The beginning of the industrial revolution in Germany came in the textile industry, and was facilitated by eliminating tariff barriers through the Zollverein, starting in 1834. The takeoff stage of economic development came with the railroad revolution in the 1840s, which opened up new markets for local products, created a pool of middle managers, increased the demand for engineers, architects and skilled machinists, and stimulated investments in coal and iron.[18] The political decisions about the economy of Prussia (and after 1871, all of Germany) were largely controlled by a coalition of "rye and iron", that is the Junker landowners of the east and the heavy industry of the west.[19]