@aequitas:
Don’ t think!
Leave it the horses, because they got bigger heads.
Sydney Greenstreet’s character of Major Duval (a French colonial army officer) says something similar in the movie Passage to Marseilles: “Discipline is more important than thought to a combat officer. An army is not a debating society – its thinking is done for it by experts.” (He says this during a discussion in which he boasts about the “invincible” Maginot Line, about five minutes before the scene in which a newspaper reports that it’s been flanked.)
The two following items aren’t military truisms, but they’re kind of funny anyway:
[TV interview with a US soldier who was being asked about his career prospects in anticipation of some planned personnel cuts in the armed forces]: “I’m a mortarman. I fire explosive charges on enemy positions using a mortar. There aren’t a lot of civilian applications for that particular skill-set.”
[From the package of an F-117 plastic model kit I saw in a store many years ago]: “The F-117 Stealth fighter is a single-seat ground-attack aircraft with a maximum speed of over 600 miles per hour and a service ceiling of 45,000 feet. It can carry two GBU-10 Paveway laser-guided bombs with 2,000-pound warheads. For ages 8 and up.”