The Kingdom of Poland (, ), also known informally as the Regency Kingdom of Poland (), was a short-lived polity that was proclaimed during World War I by the German Empire and Austria-Hungary on 5 November 1916 on the territories of formerly Russian-ruled Congress Poland held by the Central Powers as the Government General of Warsaw and which became active on 14 January 1917. It was subsequently transformed between 7 October 1918 and 22 November 1918 into the independent Second Polish Republic, the customary ceremonial founding date of the latter being later set at 11 November 1918.
In spite of the initial total dependence of this client state on its sponsors, it ultimately served against their intentions in the aftermath of the Armistice of 11 November 1918 as the cornerstone proto-state of the nascent Second Polish Republic, the latter composed also of territories never intended by the Central Powers to be ceded to Poland, and therefore played a crucial role in the resurrection of Polish statehood.
Rationale
The decision to propose the restoration of Poland after a century of partitions was taken up by the German policymakers in an attempt to legitimize further imperial presence in the occupied territories and create a buffer state to prevent future wars with Russia. The plan was followed by the German propaganda pamphlet campaign delivered to the Poles in 1915, claiming that the German soldiers were arriving as liberators to free Poland from subjugation by the Russian Empire. However, the German High Command under Erich Ludendorff also wanted to annex around 30,000 square kilometers of the territory of former Congress Poland, and planned to evict up to 3 million Poles and Jews to make room for German colonists in the so-called Polish Border Strip plan. The German government used punitive threats to force Polish landowners living in the German-occupied Baltic states to relocate and sell their Baltic property to the Germans in exchange for entry to Poland. Parallel efforts were made to remove Poles from Polish territories of the Prussian Partition.
Early plans
Germany
With the onset of the war in 1914, for the purposes of securing Germany's eastern border against the Russian imperial army, Theobald von Bethmann Hollweg, the German chancellor, decided on the annexation of a specific strip of land from Congress Poland, known later on as the Polish Border Strip. In order to avoid adding the Polish population there to the population of imperial Germany, it was proposed that the Poles would be ethnically cleansed to a proposed new Polish state further east, while the strip would be resettled with Germans.
German Emperor Wilhelm II conceived of creating a dependent Polish state from territory conquered from Russia. This new autonomous Kingdom of Poland would be ruled by a German prince and have its military, transportation, and economy controlled by Germany. Its army and railway network would be placed under Prussian command.
In several memoranda sent during 1915 and 1916, Hans Hartwig von Beseler, the Governor-General of the Polish areas under German control, proposed the establishment of an independent Polish state. Under the influence of General Erich Ludendorff, then in effect the director of Germany's eastern European operations, this proposal included the annexation of considerable amounts of land by Germany, Lithuania, and Austria-Hungary. Gerhard von Mutius, the cousin of Chancellor von Bethmann Hollweg and the foreign office's representative at Beseler's headquarters, disputed the use of annexation, insisting that "if the military interests allow for it, divisions and secessions should be avoided", as such a policy would secure an "anti-Russian inclination [toward] the new Poland".
Similar plans were advanced by influential German intellectuals in the early years of the war. Among them were Hans Delbrück, Friedrich Naumann, and Paul Rohrbach. They generally argued that because Polish nationalism and Polish society were so highly developed, Germany would encounter severe resistance if they attempted to annex large territories in Poland. They concluded that Germany could only effectively project power into Poland by establishing an autonomous Polish state as a German protectorate.