The Kingdom of Denmark was at the time in personal union with the Duchies of Schleswig and Holstein, both of which had close ties with each other, although only Holstein was part of the German Confederation.
Kerajaan Denmark pada saat itu memiliki persatuan pribadi dengan Kadipaten Schleswig dan Holstein, keduanya memiliki hubungan yang dekat satu sama lain meskipun Holstein dulunya merupakan anggota Konfederasi Jerman.