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]
(..) and she does not want me. You swore me your sword. My sword is yours till the day I die. So if I command you to stay in Meereen and patrol the streets? I'll stay in Meereen and patrol the streets. Send me to kill (..)2014 TvShow: Game of Thrones Title: Mockingbird Season: 4 Episode 7