We need to understand the differences between the events leading up to the Second Coming (Parousia) and the events following the Millennium. These events are commonly overlapped in much of the current protestant literature. One must carefully read the descriptions of the events in order to properly associate them with their proper times.
There will be a "great tribulation" such as the world has never seen.
There will be 2 Witnesses of God in Jerusalem during this Great Tribulation. These 2 Witnesses will:
He will speak out against God, the Son and the Holy Spirit.
He will utter boastful words and magnify himself, even above the one true God, making himself to be God.
He will wage ar against the saints of God.
He will make alterations to the Feasts of Israel and the Law, which God has already set.
He will be destroyed directly by Messiah, God the Son.
He will deny the Incarnation and Deity of Messiah.
All the unregenerate people of the earth will follow him.
The Beast will have a fatal head wound, but it will be healed.
All unregenerate people will be amazed and follow the Beast after his head wound is healed.
He will speak arrogant and blasphemous words against God, His Name, the Tabernacle, and the heavenly host for 1260 days (42 months, 3.5 years).
He will wage war against the saints and overcome them.
The 2 Witnesses of God will witness for 1260 days (42 months, 3.5 years)
The Beast will exercise authority for 1260 days (42 months, 3.5 years)
There will be physical signs to point the way to the Second Coming of Messiah
Messiah will return to the Mount of Olives, Jerusalem, in the clouds, where He ascended from.
Messiah will return with a great multitude following Him. (a thousand of His holy ones).
Messiah will gather His elect from all over the world, every tribe, nation and tongue will be represented.
The gathered elect will live in peace in the land promised to Jacob.
The gathering will simultaneous with His glorious return and the First Resurrection of the Saints.
The resurrection will be comprised of "sleeping" believers and the translation of the living believers only.
It will be a bodily resurrection and bodily translation.
It will be a resurrection and translation to the final, glorified state of being.
Of those resurrected and translated, their names are already written in the Book of Life.
Messiah will return to the Mount of Olives, where He will split in the mount in two and provide a new valley in between for fleeing people.
Jerusalem will rise in elevation, the remainder of the surrounding terrain will change into a plain.
There will be a highway from Egypt to Assyria.
Satan will be imprisoned for one thousand years.
Satan will be loosed after one thousand years for a final confrontation with Messiah and His people.
Satan will find allies in the surviving nations on the earth during the Millennium.
Satan will be finally judged and thrown into the Lake of Fire prepared specifically for him and his followers.
The Millennium will be a period of one thousand years.
The Millennium will be characterized as an unprecedented period of peace and justice.
Messiah Jesus will reign on the throne of David in Jerusalem as Prophet, Priest and King.
The nations will gather to pay homage to the king. Anyone who does not, will be visited with plague.
Jerusalem will be attacked twice, the first time in the Tribulation, the second time at the Final Confrontation.
After the Parousia, Jerusalem will rise in elevation to dominate the surrounding terrain.
After the Millennium, Satan will be loosed from prison and deceive the remaining nations to attack Messiah and His people at Jerusalem.
Messiah will destroy them with the breath of His mouth.
The Second Resurrection of unbelievers and the Final Judgement of Satan, his followers and the unbelievers will result in their condemnation to the Lake of Fire.
The New Heavens, Earth and Jerusalem will descend from heaven and God will dwell with man, Immanuel!