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]
(..) Jorah the Andal. You have not been dismissed. You pledged yourself to me. You swore to obey my commands for the rest of your life. I command you to heal yourself When I take the Seven Kingdoms, I need you by my side. In the last fortnight since our pact with the Masters, (..)2016 TvShow: Game of Thrones Title: The Door Season: 6 Episode 5