Satan dictates or rules a host of evil spirits in a well organized demonic hierarchy. There is proof of this demonic structure in scripture. A good example is found in Daniel where an angel had to fight the prince of Persia, which is clearly not a human being, but an evil spirit that was placed in charge of the kingdom of Persia to carry out Satan’s plans there:
Daniel 10:13, “But the prince of the kingdom of Persia withstood me one and twenty days: but, lo, Michael, one of the chief princes, came to help me; and I remained there with the kings of Persia.”
Further insight into this hierarchy and how Satan oppresses people, is found in the book of Acts:
Acts 10:38, “How God anointed Jesus of Nazareth with the Holy Ghost and with power: who went about doing good, and healing all that were oppressed of the devil; for God was with him.”
If you look up the word for oppressed in this verse, you will find the Greek word katadunasteuo, which means, “to exercise dominion against, that is, oppress.” The word dominion here does not refer to ownership of a person (it’s God who owns every soul, see Ezekiel 18:4), but rather an army that is under your rule. Satan exercises his army of fallen angels (his dominion) against us.
Now if you look up the word dominion in the the 2006 Merriam-Webster dictionary, under definition #3 it speaks of an order of angels, referencing to Celestial Hierarchy, which speaks of a host of angelic beings, including principalities, powers, etc. In Ephesians 6, we find that the powers of darkness come in different ranks and powers:
Ephesians 6:12, “For we wrestle not against flesh and blood, but against principalities, against powers, against the rulers of the darkness of this world, against spiritual wickedness in high places.”
Satan’s kingdom is made up of an army of fallen angels. When Satan was cast out of heaven, he drew with him a third of the angels, which are now fallen and known as demons or devils:
Revelations 12:4, “And his tail drew the third part of the stars of heaven, and did cast them to the earth: and the dragon stood before the woman which was ready to be delivered, for to devour her child as soon as it was born.”
Revelations 16:14, “For they are the spirits of devils, working miracles, which go forth unto the kings of the earth and of the whole world, to gather them to the battle of that great day of God Almighty.”
Satan is known as the lord of the flies (Beelzebub), because there are so many evil spirits that are under his rule in the kingdom of darkness:
Matthew 12:24, “But when the Pharisees heard it, they said, This fellow doth not cast out devils, but by Beelzebub the prince of the devils.”
Satan is the leader, and a host of fallen angels are under his rule carrying out his evil plans.