Kammala wannan jumla: Sakamakon nasarar Napoleon a kan Austria a cikin
Yaƙin Austerlitz, An rushe Daular Roman Mai Tsarki a 1805. A ranar 12 ga Yuli, 1806, jihohi 16 a cikin Jamus ta yau, gami da sauran yankuna na Nassau-Usingen da Nassau-Weilburg, a hukumance sun bar Daular Rome Mai Tsarki kuma sun shiga cikin Tarayyar Rhine. Napoleon shi ne "mai kāre" ta. A karkashin matsin lamba daga Napoleon, duka yankuna biyu sun haɗu don samar da Duchy na Nassau a ranar 30 ga Agusta, 1806.