In one scene Padre Rafael tells Dr. Canavan that the Moros are afraid of burial in a pig skin. In a later scene Dr. Canavan threatens Moro prisoner with this, and a pig skin is laid on the ground in front of the prisoner. This episode echoes a report in General Pershing's memoir "My Life Before the World War" that a Muslim fighter had been "publicly buried in the same grave with a dead pig". There is a related, but widely discredited, claim that Pershing had threatened to execute Muslim Moro prisoners with bullets dipped in pigs' blood. The historian Brian M. Linn wrote that it was unlikely that Pershing was involved in or had ordered others to commit religiously insulting acts, and that the episode in "The Real Glory" had probably fuelled the myth. This claim concerning bullets dipped in pigs' blood was referred to by Donald Trump in a presidential campaign speech in February 2016 and in a tweet following the terrorist attacks in Barcelona on August 17, 2017.