I guess most of you must, like me, have liberated an Outpost or Fortress where you have killed maybe 15 guys and thought to yourself "that was great but it's a bit silly because you could never do that in real life".
If so, read the real life exploits of Leo Major here http://en.wikipedia.org/wiki/L%C3%A9o_Major
When someone mentioned it, I thought they were making it up !