Tolkien and the Great War: The Threshold of Middle-earth - John Garth - Google Books

https://books.google.de/books?id=rMiUN8qeOBoC&pg=PA71

How the First World War influenced the author of the Lord of the Rings Trilogy: “Very much the best book about J.R.R. Tolkien that has yet been written.” —A. N. Wilson  As Europe plunged into World War I, J. R. R. Tolkien was a student at Oxford and part…