telegram with a confirmation that a German delegation would arrive shortly to sign the treaty. On 28 June 1919, the fifth anniversary of the assassination of Archduke Franz Ferdinand (the immediate impetus for the war), the peace treaty was signed. The treaty had clauses ranging from war crimes, the prohibition on the merging of the Republic of German Austria with Germany without the consent of the League of Nations, freedom of navigation on major European rivers, to the returning of a Koran to the king of Hedjaz. Territorial changes The treaty stripped Germany of of territory and 7 million people. It also required Germany to give up the gains made via the Treaty of Brest-Litovsk and grant independence to the protectorates that had been established. In Western Europe, Germany was required to recognize Belgian sovereignty over Moresnet and cede control of the Eupen-Malmedy area. Within six months of the transfer, Belgium was required to conduct a plebiscite on whether the citizens of the region wanted to remain under Belgian sovereignty or return to German control, communicate the results to the League of Nations and abide by the League's decision. To compensate for the destruction of French coal mines, Germany was to cede the output of the Saar coalmines to France and control of the Saar to the League of Nations for 15 years; a plebiscite would then be held to decide sovereignty. The treaty restored the provinces of Alsace-Lorraine to France by rescinding the treaties of Versailles and Frankfurt of 1871 as they pertained to this issue. France was able to make the claim that the provinces of Alsace-Lorraine were indeed part of France and not part of Germany by disclosing a letter sent from the Prussian King to the Empress Eugénie that Eugénie provided, in which William I wrote that the territories of Alsace-Lorraine were requested by Germany for the sole purpose of national defense and not to expand the German territory. The sovereignty of Schleswig-Holstein was to be resolved by a plebiscite to be held at a future time (see Schleswig Plebiscites). In Central Europe Germany was to recognize the independence of Czechoslovakia (which had actually been controlled by Austria) and cede parts of the province of Upper Silesia. Germany had to recognize the independence of Poland and renounce "all rights and title over the territory". Portions of Upper Silesia were to be ceded to Poland, with the