Saar Protectorate – Wikipedia

The Saar Protectorate officially Saarland was a French protectorate and a disputed territory separated from Germany. On joining the Federal Republic of Germany as a state of its in 1957, it became the smallest “federal state”, the Saarland, not counting the “city states” of Berlin, Hamburg, and Bremen. It is named after the Saar River. The region around the Saar River and its tributary valleys is a geographically folded, mineral-rich, ethnically German, economically important, and heavily indust

https://en.m.wikipedia.org/wiki/Saar_Protectorate