Is "Duty, Honor, Country" always capitalized?

[Nomak54]

Working on a short essay for USMA. I'm referring to a brief story of Benjamin Davis Jr., and I want to end the sentence something like "his story is a perfect example of duty, honor, country."

I get this feeling like it should be capitalized, I think I've seen it like that around the website somewhere but I just can't decide

 

[Recoveringhelicoptermom]

Put it in quotes and you can capitalize it.....

 

[Jarhead713]

To me it seems like it shouldn't be capitalized.

But hey! What do I know? Just a 34 on the english ACT and a 5 on the AP Language and composition exam

(Just a joke, hope your essay is going well )