You want a John Wayne reference? In the movie Rio Grande, John Wayne plays a cavalry colonel whose own son is sent to his unit after he flunks out of West Point. They have not seen each other in 15 years, since the Civil War. When the new recruit is brought to his father, they discuss how things are going to be. When dismissed, his son salutes his father, at which point the colonel half heartedly waves a salute back at him from a seated position. When the recruit remains at attention, his father asks what he is waiting for. The recruit tells his father that his salute is to be properly returned, at which point the first sergeant chuckles, but draws a quick rebuke from the colonel, who rises, puts on his cover, and properly returns his son's salute. The recruit is then dismissed. Even Hollywood got it right, and that movie was made in 1950.