Medal Trier Wieder Frei (im juni 1930)

I found this nice medal of Trier Wieder Frei. I can't find any information in internet. Can somebody tel more about this?

Hello,

Based purely off my historical knowledge, I can tell you it is a medal commemorating the withdrawal of occupying French troops from the Rhineland (where the city of Trier is situated) in June 1930, having been there since the end of WWI. I couldn't find any references for it online, though...