<P> 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 . </P>
<P> 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 . </P>
when did denmark lose schleswig and holstein to prussia
when did denmark lose schleswig and holstein to prussia
March 1848
March 1848