I'm looking for the story/verse
Falls the Shadow by
ambiguous_opal. Summary: Jarad is a "green" soldier on the lands of Vietnam, shipped so far from anything that even the war seems almost surreal Jared finally begins to get a grip on things. Until the Green Berets return and for the first time Jared meets Jensen, a deadly soldier who makes the war seem like the least of Jared's problems.
On the Deleted Authors page here, the author didn't prohibit sharing their works, so I'm hoping someone made a copy of it.
Via the Wayback Machine, I can see at least 9/12 entries, but only one or two can be accessed that way.
Fingers crossed that someone can help.