This authentic brass Frederic William III, King of Prussia's Dagger replica, 1797-1840 by Denix. Frederic William III declared war on France (1806), suffered a disastrous defeat at Jena and was forced to sign the Treaty of Tilsit (1807). In Prussia, some progressive reforms were made, but a constitution, although promised, was never produced, and the king became increasingly reactionary. The reorganized Prussian army re-entered the Napoleonic Wars in 1813 and played a major part in Napoleon I's eventual defeat. You must be 18 years of age to purchase this Prussian Dagger.