Literary references in Stanley Kurbick's "Paths of Glory"

Two literary references caught my attention in the film "Paths of Glory" directed by Stanley Kubrick (1957).

Quote by Samuel Johnson that underscores many aspects of the film:
"Patriotism is the last refuge of a scoundrel."


Except from "Elegy Written in a Country Churchyard" by Thomas Gray which contains the films title:

Let not Ambition mock their useful toil,

         Their homely joys, and destiny obscure;

Nor Grandeur hear with a disdainful smile

         The short and simple annals of the poor.

The boast of heraldry, the pomp of pow'r,

         And all that beauty, all that wealth e'er gave,

Awaits alike th' inevitable hour.

         The paths of glory lead but to the grave.

Link to poem by Thomas Gray:  http://www.poetryfoundation.org/poem/173564