Prussian Nights is a long poem that Solzhenitsyn composed, mostly in his head, while he was serving
Prussian Nights is a long poem that Solzhenitsyn composed, mostly in his head, while he was serving a sentence of forced labor. It recounts his experiences in the war (although it isn’t purely autobiographical), when his battery formed part of the Second Belorussian Front that invaded East Prussia from the south in January 1945. -- source link