Revelation 12:7 And there was war in heaven: Michael and his angels fought against the dragon; and the dragon fought and his angels,
Demons have rank and file in their army
Paul speaks of varying rank and position in the enemy’s host (Eph 6:12) where he mentions principalities rulers (magistrates), powers (authorities), rulers (worldwide or far reaching) of darkness, shadiness, obscurity; spiritual wickedness in high places – spiritual, religious, in heavenly arenas – over reaching wickedness. These spiritual beings have authority over the influences in this age because the devil is the god of this age and influences all by the fashions, styles and worldly things that capture humans -- saved and unsaved – to conform everyone to his plans and purposes. It appears that the rank or position in authority that they hold whether they are fallen or not are all subject to the other’s authority (Jude 9; Dan 10:12-13, 20-21; Matt 17:18-21). Jesus alluded tothis when He cast out a demon in a boy and then told His disciples that this particular kind goes out only by prayer and fasting. The demon was apparently if higher authority that the rank and file (principalities).