Flag of the Saarland state, Germany

Saarland (German: [ˈzaːɐ̯lant] , Luxembourgish: [ˈzaːlɑnt]; French: Sarre [saʁ]) is a state of Germany in the southwest of the country. With an area of 2,570 km2 (990 sq mi) and population of 990,509 in 2018, it is the smallest German state in area apart from the city-states of Berlin, Bremen, and Hamburg, and the smallest in population apart from Bremen. Saarbrücken is the state capital and largest city; other cities include Neunkirchen and Saarlouis. Saarland is mainly surrounded by the department of Moselle (Grand Est) in France to the west and south and the neighbouring state of Rhineland-Palatinate in Germany to the north and east; it also shares a small border about 8 kilometres (5 miles) long with the canton of Remich in Luxembourg to the northwest. Having long been a relatively small part of the long-contested territories along the Franco-German linguistic border, Saarland first gained specific economic and strategic importance in the nineteenth century due to the wealth of its coal deposits and the heavy industrialisation that grew as a result. Saarland was first established as a distinct political entity in 1920 after World War I as the Territory of the Saar Basin, which was occupied and governed by France under a League of Nations mandate. Following World War II in Europe, the territory was occupied by France then became the Saar Protectorate on 17 December 1947. After the 1955 Saar Statute referendum, it joined the Federal Republic of Germany as a state on 1 January 1957. Saarland used its own currency, the Saar franc, and postage stamps issued specially for the territory until 1959.