Germany's Territorial Losses at Versailles

From The Weimar Years: Rise and Fall 1918–1933, by Frank McDonough (Bloomsbury, 2023), Kindle pp. 118-120:

It is, of course, an established tradition of war that the loser pays the costs of defeat, but the terms of the proposed Versailles Treaty were severe, to say the least. Alsace and Lorraine were returned to France, something which had been a French aim during the war. German territory west of the Rhine was to be occupied by Allied troops for at least 15 years to ensure German compliance to the treaty – if Germany did comply, the occupation of Cologne would end after five years, Koblenz after ten years and Mainz after 15 years. The left bank of the Rhine and the right bank to a depth of 31 miles were to be permanently demilitarised. In this region no German arms or soldiers could be stationed. The aim of these clauses was to stop another unprovoked German invasion of Belgium and France.

The Saar, a rich coal mining region, would be governed for 15 years by a commission of the League of Nations. In that time, the Saar coal mines would be given to France, as compensation for the German destruction of French coal mines during the war. At the end of the 15-year period, the people of the Saar would decide, in a referendum, whether they wished to remain under League control, to unite with France or return to Germany. If the people chose the latter option, Germany would be allowed to buy back the mines from France. Belgium received Moresnet, Eupen and Malmédy, but the local populations there would be allowed a referendum to confirm or reject this change. A referendum was also offered to determine the fate of North Schleswig, which voted in favour of being transferred to Denmark.

Germany suffered even greater territorial losses in Eastern Europe. The newly constituted state of Poland included the industrially rich area of Upper Silesia, along with Posen and West Prussia – the latter including the so-called Polish Corridor, which controversially separated East Prussia from the rest of Germany. Poland was also given extensive trading rights in Danzig (Gdansk), which was now designated a Free City under League of Nations authority. Danzig was Poland’s natural seaport, but ethnically it was a German city and would remain a source of unrest between Germany and Poland during the inter-war years. In addition, the German port of Memel was detached from the Reich, but was not formally awarded to Lithuania until 1923.

German territorial losses under the Treaty as a whole amounted to 13 per cent of its European lands, together with six million of its people. If Germany had been allowed to unite with Austria, it would have lessened the blow of these European territorial losses. Both countries were favourable to the union, but no referendum was offered. The Allies decided instead to prohibit the union with Austria (Anschluss).

Germany’s European losses were paralleled by the sacrifices it was forced to make elsewhere. All overseas colonies under German control were redistributed under mandates issued by the League of Nations, but it was stipulated these mandates must not simply serve the interests of their guardians. When the German delegation protested the loss of its colonies, the Allies pointed out the native inhabitants of the German colonies were strongly opposed to being returned to German control.