We are told that the Beast/Antichrist has power to make war with the Saints and overcome them.

..................Revelation 13:7
" And it was given unto him to make war with the saints, and to overcome them: and power was given him over all kindreds, and tongues, and nations."

...........He would destroy all who believe in Christ if he were given the time.

..................God will cut him short so he can't accomplish his intentions.