Flag of Schleswig-Holstein flag on 18 January 1957. The plain tricolour is the state's civil flag. Government authorities use the state flag ("Landesdienstflagge"), where the flag is defaced by the state coat of arms. The tricolour was previously used for the Prussian province of Schleswig-Holstein (1868-1946). It is almost identical to the flags of the Kingdom of Yugoslavia, Serbia and Montenegro (FR Yugoslavia), as well as the flag of the Netherlands inverted. Flag of Schleswig-Holstein The flag of Schleswig-Holstein is a horizontal tricolour of blue, white, and red. Schleswig-Holstein is one of the 16 states of Germany, comprising most of the historical duchy
Flag of Germany German Empire retained black, white, and red as its national colours, with the tricolour previously used by the North German Confederation officially adopted as its flag in 1892. The black-white-red tricolour remained the flag of Germany until the end of the German Empire in 1918, in the final days of World War I. Following the declaration of the German republic in 1918 and the ensuing revolutionary period, the so-called Weimar Republic was founded in August 1919. To form a continuity between the anti-autocratic movement of the 19th century and the new democratic republic, the old black-red-gold tricolour was designated as