“Then they will deliver you up to tribulation and kill you, and you will be hated by all nations for My name’s sake. And then many will be offended, will betray one another, and will hate one another. Then many false prophets will rise up and deceive many. And because lawlessness will abound, the love of many will grow cold. But he who endures to the end shall be saved. And this gospel of the kingdom will be preached in all the world as a witness to all the nations, and then the end will come.” Matthew 24:-14

How, when and by whom is this gospel of the kingdom preached in all the world as a witness to all nations just prior to the end?

“Then I saw another angel flying in the midst of heaven, having the everlasting gospel to preach to those who dwell on the earth—to every nation, tribe, tongue, and people— saying with a loud voice, “Fear God and give glory to Him, for the hour of His judgement has come; and worship Him who made heaven and earth, the sea and springs of water.” Revelation 14:6-7

It will be one of three angels that God sends out with messages for all peoples on earth just prior to the wrath of God being poured out on the unrepentant.

In Revelation, at the completion of his commentary on the opening of the sixth seal, John says, “For the great day of His wrath has come; and who is able to stand?”

The Rapture of the saints happens at the seventh seal just prior to the wrath of God being poured out with the trumpet and bowl judgements.