When should you use title case? Why would anyone use title case in these sentences?

He was a Prisoner of War (POW).
He was a prisoner of war (POW).

He was Missing in Action (MIA).
He was missing in action (MIA).

He was Killed in Action (KIA).
He was killed in action (KIA).


All are lowercase in ordinary text, even though their initials are capitalized, like television, lowercase but with capitalized initials: TV. The phrases prisoner of war and missing in action are lowercase in the U.S. Department of Defense dictionary, available online at www.jcs.mil/Portals/36/Documents/Doctrine/pubs/dictionary.pdf. Maybe killed in action didn't need defining.

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  • Agreed, although I'd probably capitalise the words if I introduced the initialism first: "He was a POW (Prisoner of War)" because you're not using the words in a sentence, and it highlights the initials. Whether that's correct or not, I don't know. – TripeHound Nov 1 '18 at 16:24

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