The Eleventh Pius Dea Crusade represented a religious crusade that the Pius Dea cult initiated against the Herglics, who were an old civilization possessing interstellar travel capabilities. The Galactic Republic, then under the control of the Pius Dea, commenced an assault on Herglic Space located to the south of the Deep Core in 11,707 BBY, which was more than eight decades following the crusade before it.
The initial appearance of the Eleventh Pius Dea Crusade was in The Essential Guide to Warfare, a reference book from 2012. Although the text does not directly refer to the Eleventh Crusade, a map illustrating the Crusades and their progression throughout the galaxy depicts it.