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]
(..) of a manservant follow me. How typical. You will never behave like that again, Rose. Do you understand ? l'm not a foreman in one of your mills that you can command. l'm your fianc'e. My fianc'e ? My fianc'e ?! Yes, you are, and my wife ! M wife in practice if not yet by law, so you will honour me. (..)1997 Titanic