She has a reputation that 'commands' attention/respect. [=people give her respect/attention because of her reputation]
In the United States, the President as the commander in chief is at the head of the military 'chain of command'.
She seems to be 'in (full) command of' the situation. [=she seems to have complete control of the situation]
(..) in the North against us. We don't need every house in the North. The Umbers, the Manderlys, and the Karstarks command more soldiers than all the other houses combined. With their support, none could challenge us. The Starks lost my house the day King Robb cut off my father's head. (..)2016 TvShow: Game of Thrones Title: Home Season: 6 Episode 2
(..) in the Red Keep, Your Grace, for your own protection. You're barring me from attending my own daughter's funeral? Forgive me, Your Grace, by the king's command, I cannot let you pass. I would like to speak to my son. He has left the Red Keep, Your Grace. ( exhales ) She grew up. Jaime: (..)2016 TvShow: Game of Thrones Title: Home Season: 6 Episode 2