In God’s timing, when the Gospel of the kingdom has been preached in the whole world for a witness to all the nations, the end will come (Matthew 24:14). John the Apostle received a vision of the events of the end times and wrote it down for us in Revelation. At this point in our study, the Rapture of the Church has already occurred (pretribulation view). The tribulation begins with a signed covenant with Israel, promising peace.
For then there will be a great tribulation, such as has not occurred since the beginning of the world until now, nor ever will. (Matthew 24:21, NASB)