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]
(..) from the bag. Give it to me. Squeeze his legs as hard as you can. It's okay. The holo. The holo. Unfit for command. Transfer primary security clearance... Say your name. Katniss Everdeen. What did you just do? (..)2015 The Hunger Games: Mockingjay - Part 2
(..) have one in the capitol. - After we take it. - Gather 'round. Squad , you're my unit. Lieutenant Jackson is my second-in-command. Each one of you is elite in some form of combat. But we are a non-combat unit. So we'll be following days behind the front-line troops. (..)2015 The Hunger Games: Mockingjay - Part 2