Which World War I regiment did J.R.R. Tolkien serve in as a second lieutenant?

J.R.R. Tolkien served as a second lieutenant in the Lancashire Fusiliers during the First World War. He joined the British Army after completing his studies and trained before being sent to France in 1916.

Tolkien served with the 11th Battalion, Lancashire Fusiliers, during the Battle of the Somme. He became ill with trench fever and was returned to England for treatment later in 1916. The illness prevented him from returning to active service for the rest of the war.

His wartime experience is sometimes presented as a direct explanation for particular characters or events in Middle-earth. Tolkien resisted simple one-to-one interpretations, but the war undeniably formed part of his generation’s historical background and affected many of his contemporaries.

The regiment should not be confused with the Oxford and Buckinghamshire Light Infantry, a unit sometimes mentioned in discussions of Tolkien because of his military service and later historical associations. The Lancashire Fusiliers is the specific regiment linked to his commission.