The dark_valley.zip file you have requested: Maps Levels Missions / Conquest Maps / C to D Titles / Dark Valley - 5.35mb is not available. Perhaps try browsing all files for the game Battlefield Vietnam and upload any files you want to share or are missing. This is the only information we could locate:
a moderate sized island foot soldier heaven, rich terrain and tons of hiding spots.(Unzip to (Game DirectoryModsBfVietnamArchivesBfVietnamLevels) A moderate sized island that is a slice of foot soldier heaven. Filled with rich terrains and tons of hiding spots.