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]
(..) Spread out, secure the perimeter. I got a big gap over here. JOHN: Why didn't we know about this? BARBAROSA: Sir, I think this is what Command's looking for. I'm in their source code. These people are being taken to San Francisco. Some sort of R and D project for a new Terminator. (..)2009 Terminator Salvation
(..) WOMAN: Let's go, let's go! Move it! MAN : Connor is on the ground. OLSEN: This mission is a quick in-and-out. Command deems the information on those computers... ...to be of the highest priority. BARBAROSA : Connor, there's no sign of the machines. They're gone. (..)2009 Terminator Salvation