Revelation 12 discusses Michael's role in the end-times; he will lead the armies of God against the Devil and his armies and be victorious.
Revelation 12:7-9, New Testament, The Church of Jesus Christ of Latter-Day Saints, accessed February 26, 2022
7 And there was war in heaven: Michael and his angels fought against the dragon; and the dragon fought and his angels,
8 And prevailed not; neither was their place found any more in heaven.
9 And the great dragon was cast out, that old serpent, called the Devil, and Satan, which deceiveth the whole world: he was cast out into the earth, and his angels were cast out with him.