The Territory of the Saar Basin (, ; ) was a region occupied and governed by the United Kingdom and France from 1920 to 1935 under a League of Nations mandate. It had its own flag (adopted on July 28, 1920): a blue, white, and black horizontal tricolour. The blue and white stood for Bavaria, and white and black for Prussia, out of whose lands the Saar Territory was formed. Initially, the occupation was under the auspices of the Treaty of Versailles. Its population in 1933 was 812,000, and its capital was Saarbrücken. The territory closely corresponds with the modern German state of Saarland, but was slightly smaller in area. After a plebiscite was held in 1935, it was returned to Germany. Governing Commission Under the Treaty of Versailles, the highly industrialized Saar Basin, including the Saar Coal District (), was to be occupied and governed by the United Kingdom and France under a League of Nations mandate for a period of fifteen years. Its coalfields were also to be ceded to France. During this time, the Saar Territory was governed by the five-person Governing Commission (; abbreviated Reko) made up of representatives of the occupation forces. Under the terms of the mandate, the Commission had to include at least one French person and one German resident of the Saar. After the fifteen years, a plebiscite would be implemented to determine the Saar's future status. The Territory comprised the portions of the Prussian Rhenish Trier Region and the Bavarian district of the Palatinate, whose populations included a significant number of the miners who worked in the Saar coal mines. The Territory issued its own postage stamps and currency (the Saar franc). Chairman of the Governing Commission The Saar region was governed by the following Chairmen of the Commission of Government: Regional Council of the Saar Territory The Saar Territory had no home rule; instead, the Governing Commission (known in German as the Regierungskommission or "Reko" for short) decided on all legislation alone. According to paragraph 23 of the Versailles Treaty the Governing Commission had to establish an assembly of elected representatives of the inhabitants of the Saar Territory in such a manner as the Governing Commission would determine itself. So on 24 March 1922, after four years without any official representation of the people, the Reko decreed the formation of a Saar Territory assembly called the Regional Council (). In