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]
(..) - Man #: Black Walder: we've just surrendered our most valuable prisoner. Welcome home, my lord. Command all the forces within the castle to lay down their arms. Open the gates. - My lord-- - Your lord has given a command. Man: (..)2016 TvShow: Game of Thrones Title: No One Season: 6 Episode 8