The Bible describes two specific events concerning the return of Jesus Christ to earth. Beforehand, there’s an event which will happen in the twinkling of an eye. Jesus will Rapture believers and meet the Church in the clouds. By doing this, God will spare committed Christians from suffering during the Tribulation period.
In St John’s revelation of the end times, God revealed to him that before Christ’s return to earth, the armies of an Antichrist dictatorship will descend upon Israel, and this evil army and their leader Antichrist will be defeated at the Battle of Armageddon.