Was gonna mention that myself MarineAO,in the 9th ID in '70 starlight scoped M2's were used routinely mounted on tracks when the terrain was right for night perimiter defence.A few very long kills were made.

BBB-
You need to understand that most countries follow,or talk about ,the Geneva convention only when it is to their advantage to do so.I might wish this were diferent.The convention says that it's that it's a no-no to shoot medics,however I've ended up with a nice round puckered scar on my ass and a bunch dead medic buddies and this seems to indicate to me that somebody neglected to read that part.The convention also has sections dealing with the treatment of prisoners and civilians.Given your age I will not be too discriptive but I -and quite a few other folks on this site-can tell you for an absoute fact that the VC/NVA did NOT play by the "rules".