Yes, LOTR was J.R.R. Tolkien, but the faux St. Crispin’s Day speech with allusions to the Poetic Eddas from the movie should be attributed to the screenwriter for the movie Return of the King, not Tolkien himself, as Aragorn’s speech before the Black Gate occurs only in the movie version.
From the Poetic Edda:
Axe-time, sword-time, shields are sundered,
Wind-time, wolf-time, ere the world falls;
A good speech, but then most battle-inspiration speeches, whether in real life or in fiction, written in English since the late 1500’s by folks literate enough to know Shakespeare’s St. Crispin’s Day speech have been.
...Aragorn’s speech before the Black Gate occurs only in the movie version.
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Thank you. I did not realize that. It has been about 45 years, though, since I read the LOTR books.