What is the name of the clone unit designation for Commander Cody’s legion?

The story behind the answer

Commander Cody served under Obi-Wan Kenobi in the 7th Sky Corps, the corps-level formation that included Cody’s 212th Attack Battalion. That broader corps designation is what identifies his legion. Common mix-ups: “212th Assault Corps” isn’t canon—the unit is the 212th Attack Battalion; the 41st Elite Corps belonged to Commander Gree (not Cody); and the 501st—nicknamed “Vader’s Fist”—was a Legion under Anakin Skywalker/Captain Rex, not a “Vanguard Corps.”

Renowned for aerial and rapid-insertion tactics, the 7th Sky Corps deployed Airborne Clone Troopers and jetpack units, often marked with the 212th’s distinctive orange livery. They led major campaigns from Ryloth to Utapau—where Cody received Order 66 targeting General Kenobi—illustrating how corps- and battalion-level structures intertwined across the Grand Army of the Republic.