If you think attention to detail isn't important, then you need to read some pictofacts about little things that meant a lot. The irony of the story above is that the Germans would have gotten into all kinds of hot water if they hadn't ended their messages in the same way every time.
I knew who this was already, but it was confirmed as soon as I saw the word "whup," since that's how they say it here in Kentucky.
You can see plenty more stories of small details that made a huge difference at Cracked.
https://partners.vice.com/amc/mcmafia2/news/please-tip-in-cash-the-shadow-economy-of-american-nail-salons-1/