Turning Point at Locarno, 1925

From The Weimar Years: Rise and Fall 1918–1933, by Frank McDonough (Bloomsbury, 2023), Kindle pp. 377-379:

When the question of Germany’s entry to the League of Nations cropped up, Stresemann defended his government’s unwillingness to be bound by Article 16 of the Covenant. Germany, he said, could not pledge itself to support Poland in a war involving the Soviet Union. Briand tried to reassure him by saying that as Germany would be given a permanent seat on the League Council it could veto any proposal it disagreed with. A formula was finally worked out whereby each member of the League was obligated to cooperate against military aggression ‘to an extent which is compatible with its military situation, and which takes its geographical situation into account’. In return, Stresemann promised Germany would seek entry into the League of Nations as soon as possible.

Mussolini, the Italian Prime Minister, was initially lukewarm on the proposed Locarno agreements. He wanted a guarantee of the Brenner frontier between Italy and Austria to be added to the treaties, but Stresemann said this would only be possible if Germany was allowed to unite with Austria, something the Allies were not willing to accept. However, once it became clear the agreements would be signed, Mussolini turned up, on 14 October, wanting to share in the glory of joining Britain in guaranteeing the peace of Europe.

The ‘big day’ of the Conference took place in the town hall in Locarno on 16 October 1925. It witnessed the signing of the Treaty of Mutual Guarantee between Germany, France, Belgium, Great Britain, and Italy (the Locarno Pact). Under its terms, Germany recognised its western borders as fixed by the Treaty of Versailles, and the continuance of the Rhineland demilitarised zone in perpetuity. Stresemann emphasised the voluntary affirmation of Germany’s western borders was much more acceptable than the dictated terms of the Versailles Treaty. Germany, France and Belgium all agreed not to attack each other ever again, and Britain and Italy agreed to function as the joint guarantors of the agreement. All the parties agreed to settle disputes by peaceful means in future. The Locarno Treaties would only come into force when Germany was finally admitted to the League of Nations. The signatories further agreed to meet in London on 1 December for a formal signing ceremony.

Annexed to the main treaties were the German–Polish, German–Czechoslovak, German–Belgian, and French–German arbitration treaties, which promised all disputes which could not be settled amicably through normal diplomatic channels would be submitted to an Arbitration Panel or to the Permanent Court of International Justice. To add further insurance in Eastern Europe, France signed binding treaties with Poland and Czechoslovakia, pledging mutual assistance, in the event of conflict with Germany. Polish and Czech leaders signed these agreements in fear rather than hope. The agreements reaffirmed existing treaties of alliance concluded by France with Poland on 19 February 1921, and with Czechoslovakia on 25 January 1924. The British government refused to be a party to the arbitration treaties.

The Locarno Treaties were a key turning-point in the international relations of the 1920s. They were the effective diplomatic end of the Great War, and reconciled Germany and France in a way that had previously seemed impossible. Locarno was a much bigger triumph for the appeasement of Germany than Neville Chamberlain ever achieved, and how ironic that his half-brother Austen was one of its chief architects.