I think that soldaten briefe would usually refer to soldiers' letters, but I am trying to work out what it means in context in a Red Cross report about German pows in the UK: There was a complaint about - "Incomplete series of “Soldatenbriefe”. Then a response - "No series of “Soldatenbriefe is complete, which renders impossible the continuation of courses and the completion of study programmes recommended by the authorities of the Reich." This does not seem to refer to letters. Does anyone know what it does refer to? Thank you and best wishes.