Legio XX Valeria Victrix lends its name to the character Valeria Matuchek in Poul Anderson's Operation Chaos and its sequel Operation Luna; her mother is said to describe this legion as the last to leave Britain -- "the last that stood against Chaos."
Religious diversity: Although the narrator, Steve, hints at his and his wife's vague Christianity mitigated by agnosticism, and the existence of a "One True God" is assumed, the reality of a diverse number of religious traditions is affirmed, including Native American (specifically Zuni) beliefs, Norse mythology, Asian traditions (specifically Chinese mythology), and Judaism (in a small part, as Steve regards the holiness of his Jewish neighbors with reverence).
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The IRS (Inquisition for Revenue Securement) and NASA (National Astral Spellcraft Administration) also become involved.
Operation Overlord | Operation Enduring Freedom | Operation Barbarossa | Organization for Security and Co-operation in Europe | Operation Market Garden | Luna | Organisation for Economic Co-operation and Development | Operation Torch | Operation Vistula | Luna (band) | operation | Juan Luna | Operation Provide Comfort | Operation Anaconda | Police and Judicial Co-operation in Criminal Matters | Operation Weserübung | Operation Shingle | Operation Ivy | Operation Highjump | Operation Blue Star | Operation Anthropoid | Bigas Luna | Operation Paperclip | Operation Downfall | Operation Deny Flight | Antonio Luna | Operation Thunderbolt | Operation Southern Watch | Operation Michael | Operation Entebbe |