I want to know the answer to the following question:
What was the name of the treaty that allowed Germany to ceded the land to France?
All the background I'm provided with is that "Although U.S. President Woodrow Wilson had insisted that the région was self-ruling by legal status, as its constitution had stated it was bound to the sole authority of the Kaiser and not to the German state, France tolerated no plebiscite, as granted by the League of Nations to some eastern German territories at this time, because Alsatians were considered by the French public as fellow Frenchmen liberated from German rule.". Is that enough to answer the question?
Answer: no