Napoleonic Wars.
I quote once more from Dr. Spaight’s work, where much information may be found in a condensed form. “A hundred years ago, England, while she prayed in her national liturgy for all prisoners and captives, had no compunction about confining the French prisoners of war in noisome hulks and feeding them on weevily biscuits, salt junk and jury rum, which sowed the seed for a plentiful harvest of scurvy, dysentery and typhus.” (“War Rights on Land,” p. 265.)