https://www.gamespot.com/articles/how-to-find-splinter-cells-sam-fisher-in-ghost-rec/1100-6458139/

Each of the big expansions in Ghost Recon Wildlands' Year 2 of updates will feature a distinct theme. The newly released Special Operations I's theme is Splinter Cell, offering new PvE and Ghost War PvP content based on Ubisoft's fellow Tom Clancy game series. On the PvE side, there's a new mission featuring protagonist Sam Fisher, but he won't simply pop up in front of you (he is a spy, after all).