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]
(..) Resync by First Ranger, you have command of Castle Black. Lord Commander, it is my duty to tell you I believe this mission to be reckless, foolhardy, and an insult (..)2015 TvShow: Game of Thrones Title: The Gift Season: 5 Episode 7