Saarbrücken became capital of the Saar territory established in 1920. Under the Treaty of Versailles (1919), the Saar coal mines were made the exclusive property of France for a period of 15 years as compensation for the destruction of French mines during the First World War. The treaty also provided for a plebiscite, at the end of the 15-year period, to determine the territory's future status, and in 1935 more than 90% of the electorate voted for reunification with Germany, while only 0.8% voted for unification with France. The remainder wanted to rejoin Germany but not while the Nazis were in power. This "status quo" group voted for maintenance of the League of Nations' administration. In 1935, the Saar territory rejoined Germany and formed a district under the name Saarland.