I worked with a guy who said he was in the Mekong delta, he retired this past April . As healthy as a horse and strong as a mule, I went to see him a couple of weeks ago . He's a good friend and I miss seeing him every day.....he once told me that he would have to walk in water up to his chin, carrying his rifle over his head for hours at a time. I didn't know how true his stories were, cause he is kinda tall and I thought that a short guy would have been totally screwed.