Which operation in "Tom Clancy's Rainbow Six Siege" introduced the "Skyscraper" map?

The operation in Tom Clancy's Rainbow Six Siege that introduced the Skyscraper map is Red Crow. This operation, released in November 2016, added the Skyscraper map to the game's multiplayer mode. Skyscraper is set in a luxurious high-rise building in Nagoya, Japan, and offers a unique vertical gameplay experience. It features narrow corridors, destructible walls, and various vantage points, all contributing to intense and strategic gameplay. Overall, Red Crow operation brought the Skyscraper map, offering players a fresh and challenging environment to test their skills in Rainbow Six Siege.