1. The Rapture of the Church - the faithful saints.
2. The persecution of Saints left behind.
3. The tribulation saints who overcame seen in heaven. Rev 7:9-17.
4. 144,000 Jews will be sealed to protect them from the seven trumpet judgment of God. Rev 7:1-8.
5. The seven trumpet judgment of God on the kingdom of the world to avenge the death of Christians persecuted. Rev 8,9, 11:15
6. The Prophetic ministry of two witnesses who will preach the gospel as a witness to all nations for about three and a half years and nobody could withstand them because of the great signs and powers they perform. Elijah is one of them in fulfillment of Prophecy. Rev 11:3-6.
7. The Two Prophets will be killed after they are through with their mission but they will not bury them. Their dead bodies will be left on the streets of Jerusalem and celebration will be made by the ungodly world for their death. Rev 11:7-10.
8. The two prophets will rise from the death and will be raptured before their very eyes. Rev 11:11-12.
9. A tenth part of Jerusalem will be destroyed by earthquake and the remnant will give glory to God - Rev 11:13.
10. The completion of the seven trumpet judgment - Rev 11:15. Thus preparing the way for the establishment of the kingdom of our God and our Lord Jesus.
11. Revelation of the first beast who will be the new world ruler of the revived Roman Empire made up of a confederation of ten European nations - Rev 13:1-10.
12. Revelation of the second beast who is the false Christ the Jews will temporarily accept as their long awaited Messiah - Rev 13:11. The two horns likely represents the Israel and Judah. According to Daniel, he will sign a seven years treaty with Isreal.
13. The second beast will set up an image of the first beast and forces everyone to receive a mark on their forehead or their right hand without which they can not buy or sell. This is the image Daniel saw that our Lord Jesus also made reference to in Matthew 24:17. This is the mark of the beast and the number 666.
14. The persecution of the Jews will start as they will not worship the image. This is the great tribulation our Lord Jesus spoke of in Matthew 24:21-22. Rev 13:13.
15. The Rapture of the 144,000 Jews earlier sealed in Chapter 7. Rev 14:1-3. This will happen immediately after the tribulation. They could not be hurt by the tribulation because they are sealed. This is the elect that Jesus said he would gather in Mathew 24:31.
16. The spirit of the tribulation Jews who overcame the beast in heaven. Rev 15:1-4.

There are 15 more distinct events that will culminate in the marriage supper. You will get it in a soon published book.

The four beast before the throne that John saw actually symbolizes the Church. It also reveals the different Era the Church went through.

The first beast is like a lion - This is the early church.
The second beast is like a calf - This is the Church that brought idolatry into the house of God. Like the Roman catholic church.
The third beast is like a mere man - This represents the church that brought reformation but lacked the power of the Holy Spirit.
The forth beast is like a flying eagle - This is the Church that will witness the rapture. We are in that era.

Revelation 4:7 And the first beast was like a lion, and the second beast like a calf, and the third beast had a face as a man, and the fourth beast was like a flying eagle.