A League of Nations-protected city-state comprising the Baltic port of Danzig and ~200 surrounding localities, established by the 1919 Treaty of Versailles; bound in customs union and foreign policy to Poland while remaining formally separate from both Poland and Weimar Germany.
Unilaterally annexed by Nazi Germany on 1 September 1939 at the outset of the invasion of Poland; became the Polish city of Gdańsk after WWII.
Contemporary polity-specific account of the Free City's constitution and status, written during its existence; no comprehensive modern single-volume history surfaced in Open Library.