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]
(..) I seem to recall he laid siege to Storm's End for the better part of a year. All he laid siege to was the banquet table in the command tent. I told him to stay out of Robert's rebellion. He had no business fighting an actual warrior. We mothers do what we can (..)2013 TvShow: Game of Thrones Title: And Now His Watch Is Ended Season: 3 Episode 4