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]
(..) 'George! ' George, get in here! George. Sit down. take a look at this nonsense. Report by Soviet high command on their recent naval exercises in the Black Sea. Just what the admiralty has been begging us for some information on. (..)2011 Tinker Tailor Soldier Spy