After Jesus comes in the sky and all eyes see Him, He will signal His angels, with a loud trumpet blast, to go and gather all the elect “from the four winds” (Matt. 24:31). Hence, at the sound of the trumpet, all the saints who have died (the Old Testament and Tribulation saints) will be resurrected and gathered by the angels, together with the glorified bride of Christ.
Our first stop will be the Mount of Olives, which will fulfill the prophecy by the angels to Jesus’ disciples, that He “will come in just the same way as you have watched Him go into heaven” (Acts 1:11).
And besides fulfilling this great prophecy, this touchdown has at least one other purpose. It will allow mortal believers at that time to escape from the terror of the antichrist; for when His feet touches down on the Mount, it will be split from east to west, creating a large valley through which they will flee to the east, into the mountains (probably the mountains in Jordan east of the Dead Sea).
Another purpose for His touch down may be to set off a series of miraculous events that will alter the earth’s topography, described in Zechariah 14:6-11 (and it may be in some way connected to the great earthquake of Revelation 16:18-21). We don’t know exactly how these land changes will take place, nonetheless we know what the end result will be.
All the land in that area of the world (in Israel) will be changed—leveled off “into a plain from Geba to Rimmon South of Jerusalem” (Zech. 14:10). Most importantly, we know that Jesus our Lord will begin to reign as King over all the earth; and we will all reign with Him. And those believers who have come out of the Tribulation, they will also be very blessed, for there will be no more curse upon the earth (Zech. 14:11).