- "In Operation Dust Line, two Navy SEAL Operators join Team Rainbow to secure the "Border" - our new free map. This second major content update also introduces new weapon skins, advanced customisation options, the ability to change your loadouts between rounds and lots more."
— Official Website Description
Operation Dust Line is the second expansion released for Tom Clancy's Rainbow Six Siege. It added two new Operators from the U.S. Navy SEALs CTU, featured new weapons, abilities, and gameplay upgrades.
It was officially announced on April 22, 2016 and was released on May 10, 2016 for Year One Season Pass holders. As with Operation Black Ice, all content released is free for players but can be accessed one week earlier with ownership of the Season Pass.
The expansion was originally slated to be released on April 2016.