I am busy rewriting this article.
Rather read Who are the woman and her child in Revelation 12?
Purpose
Why do Michael and his angels wage war in heaven against the Satan and his angels, and what weapons do they use? – A study of Revelation 12.
The Dragon
The dragon is identified as โthe devil and Satanโ (Rev 12:9):
It โstood before the woman โฆ so that when she gave birth he might devour her childโ (Rev 12:4). Ever since God told the serpent that the seed of the woman โshall bruise you on the headโ (Gen 3:15), Satan stood ready to thwart Christโs mission.
But Jesus was โcaught up to God and to His throneโ (Rev 12:5), meaning that Satan failed.
The dragon has seven heads and ten horns (Rev 12:3). These symbolize the kingdoms of the world (Rev 17:9-10, 12). The dragon, therefore, also represents the earthly kingdoms through which Satan persecutes Godโs people.
There are three beasts in Revelation that have seven heads and ten horns each. For a more specific identification of the dragon, see – The seven-headed beasts of Revelation.
War in Heaven
The leader of Godโs angels is the archangel Michael.
He and his angels are opposed by Satan and his angels, for Satan has deceived a large number of Godโs beautiful angels to side with him against God.
Satanโs weapons are deception (Rev 12:9) and accusations (Rev 12:10). He deceives angels and people into sin and then accuses them before God.
This crisis in heaven, described as a “war in heaven” (Rev 12:7), is symbolized by Revelation 5 as “a book … sealed up with seven seals” which “no one in heaven … was able to open” (Rev 5:1, 3). In both chapters, the crisis is located in heaven but is solved by Christ’s death. For a further discussion, see – The seven seals verse of Revelation.
The Dragon
โThen another sign appeared in heaven:
and behold, a great red dragon
having seven heads and ten horns …
His tail swept away a third of the stars of heaven and threw them to the earth.
The dragon stood before the woman who was about to give birth,
so that when she gave birth he might devour her child.โ
(Revย 12:3-4)
The Dragon is Satan.
Revelation 12:9 identifies the dragon as โthe devil and Satan.โ It โstood before the woman โฆ so that when she gave birth he might devour her childโ (Rev 12:4). Ever since God told the serpent that the seed of the woman โshall bruise you on the headโ (Gen 3:15), Satan has been watching, expecting the Messiah, and standing ready to thwart His mission.
The Dragon has seven heads and ten horns
But the dragon has seven heads and ten horns, just like the beast from the sea (Rev 13:1) and the scarlet beast (Rev 17:3). โThe seven heads are โฆ seven kingsโ (Rev 17:9-10) and โthe ten horns which you saw are ten kingsโ (Rev 17:12). The dragon, therefore, also represents the earthly kingdoms through which Satan persecutes Godโs people. (For specific identification, see The Seven-Headed Beasts of Revelation.)
Jesus was caught up to God.
Satan stood ready to devour her child as soon as He was born (Rev 12:4), but Jesus was โcaught up to God and to His throneโ (Rev 12:5). In other words, Satan was defeated and Christ won the victory when He came to this earth.
War in Heaven
Rev 12:7 mentions the war in heaven briefly:
โAnd there was war in heaven,
Michael and his angels waging war with the dragon.
The dragon and his angels waged war.โ
Michael; the archangel
It is a war between two groups of angels. The name of the leader of Godโs angels is โMichaelโ (Rev 12:7). This name means โwho is like God.โย He is mentioned four times in the Bible; mostly resisting evil angels, for example:
Michael is โthe archangelโ and he argued with the devil โabout the body of Mosesโ (Jude 1:9).
When Daniel saw the angel whom God sent to him, he โretained no strengthโ (Dan 10:8). This, therefore, was a mighty angel, but this angel was delayed for three weeks by โthese forcesโ (Dan 10:13). โThese forces,โ therefore, are powerful supernatural forces. The angel said that Michael is the only one โwho stands firmly with me against these forcesโ (Dan 10:13; cf. 12:1).
Satan and his angels
Michael and his angels wage war against Satan and his angels (Rev 12:7). This means that Satan has deceived a large number of Godโs beautiful angels to his side in rebellion against God.
Michael’s victory
While verse 7 mentions the war in heaven, verses 8 to 12 describe Michaelโs victory.
Satans’ Weapons
With what weapons are the war in heaven waged? The dragon is identified as:
โthe serpent of old
who is called the devil and Satan,
who deceives the whole worldโ (Rev 12:9)
โthe accuser of our brethren โฆ
he who accuses them before our God day and nightโ (Rev 12:10).
Serpent – โThe serpent โฆ said to the womanโ (Gen 3:1). The โserpent,โ therefore, refers to Satan’s deception of Eve.
Satan – The name Satan means adversary (opponent). He is Godโs adversary, but also of all angels and people who side with God.
Deceives – He โdeceives the whole worldโ (Rev 12:9). Deception is one of his key strategies. In other words, to achieve his purposes, he tells lies. Jesus said of him, โWhenever he speaks a lie, he speaks from his own nature, for he is a liar and the father of liesโ (John 8:44).
Accuser โ He is โthe accuser of our brethren:โ He โaccuses them before our God day and night.โ Zechariah 3 shows Satan accusing Joshua the high priest of iniquity. Another example is when Satan said that Job fears God only because God protects him (Job) on all sides, but if all of Jobโs possessions are taken away, then Job would curse God (Job 1:10-11).
Devil – His role as the accuser is also reflected in the name โdevilโ (diabolos). This Greek word means “slanderer; false accuser; unjustly criticizing to hurt (malign) and condemn.โ The NASB, in a few places, also translates this word as โmalicious gossips.โ
Satan’s weapons, therefore, are not physical. He deceives and he accuses. See The seven seals verse of Revelation for a further discussion.