This is completed in the thirteenth mission "All Ghillied Up". Essentially, follow your squad mates orders and follow my path. If you get spotted, quickly reload the last checkpoint and continue on. This video was recorded on Veteran difficulty, as the difficulty level does not affect the achievement / trophy.
Here is a video guide with English commentary for this trophy!
Here is a playlist of guides for this game!
https://www.youtube.com/playlist?list=PL-HeW6XkKdUJ3mDD5Tj6n...