Now that you mention it he did say something one time about LURP or maybe LRRP and how cold it could get in the jungle at night. His name was Francis. Weird why I would remember this on a Memorial Day. Have no idea whatever about him now, where he is. Francis, if you happen to read this today Tommy was thinking about you.
LRRP is the proper abbreviation, but it was pronounced Lurp. Stands for "Long Range Reconnaissance Patrol". Usually done by semi-elite to elite soldiers... Rangers and the like.