Rorke's Drift a Pyrrhic (note spelling) victory? Not hardly. 17 killed out of 139. The idea that the braver side always wins is rubbish. Who were braver at Omdurman, Kitchener's army or the Dervishes? Who were braver on Iwo Jima, the Marines or the Japanese defenders? Courage is a very important factor, but technology can produce lopsided results irrespective of the relative bravery of the combatants. It took just as much courage to fly a bomber over Germany in 1941 as in 1945, but in 1941 crews were lucky to deliver their bombload within five miles of the target (frequently they bombed the wrong country, never mind the wrong city). By war's end average targeting error was down to 300 yards, with some specialist units achieving as little as 80 yards. The difference in combat effectiveness was profound, and it was almost wholly due to technology.
I'm also a bit fed up with the assertion that US troops are mindless undeducated automatons given to panicking and shooting indiscriminately. Nothing could be further from the truth. Their NCOs, in particular, are absolutely excellent, and it is not uncommon to find, say, a SSG with a Bachelor's or even Master's degree.