Humility
Clearly, these men were humble, did the right thing, and moved on with their lives. A similar action today would likely result in a publicist being hired to help the guys make the talk show circuit, get a book deal, and print tee shirts.
What was likely a basic virtue for these guys is looked on with confusion today. Why would you do such a noble thing and not tell anyone? Probably because these guys were doing noble things every day and not telling people about it. It's the way they lived. Isn't this the heart of the greatest generation? You just do what you're supposed to do.
This is a great read. It's why we need good journalists digging stuff like this up.