Revelation 12:7,8: "And war broke out in heaven; Michael and his angels fought with the dragon; and the dragon and his angels fought, but they did not prevail, nor was a place found for them in heaven any longer." Michael is an archangel - a special guardian angel for the nation of Israel. Apparently he commands an army of angels. Michael and the heavenly forces are victorious, making heaven off-limits to Satan and his demons.
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