'Jena' or 'Sedan'?

Franz Adam Beyerlein (1871-1949) was a German author and playwright known for his critical perspective on Prussian militarism, which is prominently featured in his work. Born in the German Empire, Beyerlein grew up during a period of significant nationalistic fervor and military expansion, which would indelibly shape his literary voice and subject matter. Perhaps his most famous work, 'Jena or Sed...