The American president
Woodrow Wilson had issued a set of war aims known as the
Fourteen Points on 8 January 1918. Point 13 called for Polish independence to be restored after the war and for Poland to have "free and secure access to the sea", a statement that implied the German deep-water port of Danzig located at a strategical location where a branch of the river Vistula flowed into the
Baltic Sea should become part of Poland. At the Paris peace conference in 1919, of the "Big Three" leaders, Wilson and the French premier
Georges Clémenceau supported the Polish claim to Danzig, but the British Prime Minister
David Lloyd George was opposed under the grounds the population of Danzig was about 90% German. In a compromise, it was agreed that Danzig would become a Free City that would belong to neither Germany nor Poland, but the latter was to have special rights in the city. The Polish delegation to the Paris peace conference led by
Roman Dmowski had asked for the cession of Danzig to Poland, and within Poland the creation of the Free City was widely seen as a betrayal of Point 13. Agreements such as the Paris convention of 1920 gave Poland certain rights with regards to the foreign relations of the Free City. Throughout the interwar period, it was widely believed that Poland was looking for any excuse to annex Danzig, and the movement of Polish military forces into the Free City was always the cause of much tension. The population of Danzig, which was 90% German at the time, never reconciled themselves to their separation from Germany and throughout the interwar period, the municipal authorities of the Free City took every opportunity to press the case for a return to the
Reich. On the part of the Baltic coast that became part of Poland, there were only two small fishing ports,
Puck and
Hel, neither of which were suitable as naval bases. The most suitable port was Danzig, which was largely demilitarized under the terms of the
Treaty of Versailles. The
League of Nations, which possessed ultimate legal authority over Danzig suggested Poland use Danzig as a ''port d'attache
in which Poland would have the right to station warships but not to build any naval base to support the warships. On 8 October 1921, an agreement was signed giving Poland port d'attache'' rights in Danzig to be renewed every three years. Polish warships wintered in Danzig when the Baltic froze over and employed the shipwrights of the Free City to do repairs and maintenance work. The Polish Navy was very small in the 1920s and consisted mostly of former German torpedo boats. With the coming of "presidential government" in Germany led by Chancellor
Heinrich Brüning in 1930 came an increase in German revanchism as strident calls were made for the return of the Free City of Danzig together with the
Polish corridor to the
Reich.
Gottfried Treviranus, the Minister of Occupied Eastern Territory in Brüning's cabinet declared in a speech at a rally outside of the
Reichstag in Berlin in August 1930: "An unjust border cannot withstand international law and the national will to live. Down with the talk of catastrophe. Rally around with courage to banish all troubles. The day will come when the fight for right will free Germany and Europe!" At the same time, politics in Danzig had taken a turn towards the right with the Danzig branch of the National Socialists under the leadership of
Gauleiter Albert Forster becoming the second party in the Danzig Senate on a platform of "Home to the
Reich!" In March 1931, the Senate of the Free City unilaterally terminated Poland's ''port d'attache'' rights. The dispute was referred to the Council of the League of Nations, which issued a ruling on 19 September 1931 that decreed that both parties should take their dispute to the
Permanent Court of International Justice in The Hague. On December 11, 1931, the Permanent Court of International Justice ruled that the existing contracts did not constitute grounds for stationing Polish warships in Danzig. The court suggested that the two sides settle the dispute themselves. On 1 May 1932, the Senate ruled that Polish Navy's warships could not enter Danzig without permission being first obtained from the Senate. The Free City had invited a group of Royal Navy destroyers to visit Danzig in June 1932, which brought tensions to the boil. On 30 May 1932, German Chancellor Brüning was dismissed by President
Paul von Hindenburg and replaced with
Franz von Papen, who was unknown to most Germans. Papen's so-called "government of the president's friends" was the most right-wing government that had been formed yet under the
Weimar Republic, and it took a hard line regarding the revision of Germany's eastern frontiers. The fact that Papen's Defense Minister,
Kurt von Schleicher was a serving
Reichswehr general who was well known for his anti-Polish prejudices caused much alarm in Warsaw. The German radio, which was controlled by the government, had taken a hard line towards Poland in the spring of 1932, engaging in what the Polish historian Piotr Wnadyz called "warlike hysteria". France, which was Poland's most important ally, supported the Polish position but also advised caution on the part of Warsaw. In June 1932, the
Lausanne Conference was scheduled to open to settle the question of reparations, which had been suspended since the Hoover Moratorium of June 1931. Papen who was to head the German delegation at Lausanne planned to meet with French Premier
Édouard Herriot, the head of the French delegation with an offer to end
French–German enmity. Papen wanted to propose a Franco-German military alliance, a customs union between France and Germany and a promise of a consultative pact in exchange for which he wanted French acceptance of
Gleichberechtigung ("equality of status") to allow Germany to rearm beyond the limits set by the Treaty of Versailles. Papen also wanted an end of the Franco-Polish alliance, which would give Germany a free hand to go to war with Poland without fear of a war with France. Papen tried to make what was likely to be an unpalatable offer about France's allies in Eastern Europe more acceptable to Herriot. Papen dressed it up as an anti-Soviet move and arguing to keep the Soviets out of Eastern Europe required a militarily stronger Germany. Marshal
Józef Piłsudski, Poland's
de facto leader, was vaguely aware from diplomatic gossip that Papen was planning on French-German negotiations at Lausanne on the future of Europe, and he decided upon a bold action to remind the powers that Poland was not to be taken for granted. Danzig was widely considered to be "the most dangerous city in Europe" as the Free City was a flashpoint in German-Polish relations that could cause a war at any moment. Since Poland was allied to France, any German-Polish war would automatically become a Franco-German war, thereby starting another world war. A report by a British journalist from 1932 stated: "Germany intends to have Danzig and the Corridor. I have no brief for her. I deplore the fact that several million Germans would shed blood for this cause, but since it is a fact and the Poles certainly cannot be talked out of their territory, how will the matter be settled except by arms? I believe there must be a war in Europe; the best we can hope for is that it will be over soon, and that it will not spread". ==Incident==