Watching the movie "300" I was thinking how well a blade at the end of something long, during a close-fight, did well to keep the opponent away. Watching WWII movies of fighting in the South Pacific, again I saw reasons why a blade, bayonet, on the end of a rifle, seemed to work wonders in close fighting. But movies of Korea (I think...), Vietnam, and even now, the bayonets seem to be replaced with knives on leg pouches. That seems to me to bring the fight a lot closer to your body. What happen to the bayonet in the military?