Take out the word "Vietnam" and replace it with "Afghanistan and Iraq" and you would be hard pressed to know the difference if you had no knowledge of military history.
Progress, far from consisting in change, depends on retentiveness. When change is absolute there remains no being to improve and no direction is set for possible improvement: and when experience is not retained, as among savages, infancy is perpetual. Those who cannot remember the past are condemned to repeat it...George Santayana
