Didn't Deku break his arm like nineteen times until he finally learned that sometimes giving it 10% is okay when that's more sustainable?

But from the context of the text – "world's largest military", "personal guard", etc. – you can determine that they're talking about the Celestial Dragons, and those guys absolutely are nearly all of them complete douchebags, and it's really not much of an exaggeration to say the Marines are first and foremost meant to guard their interests.

It sounds like you're the one that didn't watch the anime or read the manga.