They’re all humorous, they’re all deadly serious. It isn’t an accident the people I know with the best sense of humor and the most well balanced view on life are military and ex-military, vets, POWs and the like.
Geoff Metcalf has posted a list of the United States Marine Corps 24 Rules For Gunfighting, and the Navys list as well.
One more blog you should read. It was highlighted on a “Best of” Laura Ingraham show on which Laura interviewed a soldier blogger. Blackfive is his blog, and he has stories you need to hear.