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]
(..) without the stones. Korben Dallas. - We got him. - Perfect. Akanit, take command. Go to Fhloston and get the stones. lf Zorg wants them, he'll have to negotiate. Revenge is at hand. (..)1997 The Fifth Element