Territory of the Saar Basin

The Territory of the Saar Basin (German: Saarbeckengebiet, Saarterritorium; French: Territoire du bassin de la Sarre) 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 28 July 1920): a blue, white, and black horizontal tricolour.