In my opinion to make a good war movie is quite difficult. As to write a good war novel. Lattuada, later (in)famous for other movie choices, did a lot of efforts to make a reasonable plausible WWI movie. If you don't know much about WWI you will find a little bit difficult to get some references. Anyway, HMS Hampshire looks as a real British Armoured Cruiser despite her behavior on rough seas is questionable. Trenches are well done, but there is a mixture of British and French soldiers, so the starting of 1918 offensive doesn't look as "Michael". Mustard gas, or what it is, is quite impressive. And German Uhlans and horses with masks and protections against the gas is something I remember since I was 14. The movie is not a masterpiece, but I do appreciate the efforts to make a realistic WWI movie.
Review of Fraulein Doktor
