https://www.gamespot.com/articles/rainbow-six-siege-operation-chimera-updates-patch-/1100-6456873/

Update: Rainbow Six Siege's Operation Chimera is coming today, March 6. However, this means Ubisoft is taking the game's servers down--here's when the Operation Chimera update will go live and servers will go back up for your region.

Rainbow Six Siege's latest DLC, Operation Chimera, is coming to PS4, Xbox One, and PC on March 6, and with it now live on the Technical Test Server, Ubisoft has released its patch notes. In addition to adding the two new Operators, Finka and Lion, and the new co-op Outbreak event, the update introduces some gameplay tweaks and changes a bunch of Operators.