Actually, I'm a lord. I was called back to Lhant just before I graduated from the Academy.

[Let that sink in for a minute, Korra.]

The royal knights are the personal guard and army of the King of Windor. Most of Windors duchys and provinces have their own armed forces, so the Knights are tasked with keeping peace between them, and protecting the capital, Barona, as well as the people of Windor.