You know from reading my article titled, The Nine Types of Angels that there are different levels of angels. Michael is the archangel - the chief angel. Many people like to pray for the archangel Michael to appear when they are scared or stressed out about an event.
The natural conclusion is that God is the ruler of all things in, on, and around the earth. Therefore, only God has power over angels. We humans, of course, can pray and ask for the archangel Michael, but it is God who actually commands the angels.
In my article titled How to Ask the Archangel Michael for Help in Your Daily Life, I share more insight into the subject of the archangel Michael and about prayer and communication with angels and God.
Other similar articles about angels:
Encounters with Angels (MarleneB.HubPages.com)
Did You Know You Have Your Own Angels Assigned to You? (revmjm.HubPages.com)