Salvation does include being delivered from the wrath to come.
But the wrath of God does not come upon the rebellious until after the 7 years period is over.
The 6 trumpets are not the wrath of God,but warnings to the world to get right with God,but after the 6th trumpet they do not turn to God,so He gives them the man of sin to rule over them,and deceive all people that do not love God.
An example is WW1,did not turn to God,set up League of Nations,WW2,did not turn to God,set up United Nations,and that pattern will continue until God gives them the man of sin to rule over them,which God gave them a chance to turn to Him,for God gives them a chance to repent before He goes against them,like Sodom and Gomorrah,with the 2 angels in the form of men,He gave them a chance,and they blew it,so God overthrew them.
When they take the mark of the beast them repentance,and salvation,is no longer available to those that follow the beast,and God will end this sin business on earth.
That is why the Bible says the saints cannot be gathered unto Christ until there is a falling away first,which this is the condition of the world in response to accepting the truth of the Gospel,and allowing it to be preached in the world,which the time will come that they will not endure the truth of the Bible,but according to their own lusts,and fundamental Christianity will rapidly decline in impacting the world with the truth,and at the end of three and one half years the transgressors will have come to the full,and then a king of fierce countenance,and understanding dark sentences shall stand up,and deceive all who do not love God,and the man of sin claims to be God by convincing the world he harnessed the power of nature,and obtained power,evolved.
Then the saints can be gathered unto Christ.
For the first three and one half years repentance,and salvation,is still available to the world,so the saints will remain on earth,and the wrath of God is not poured upon the world.
The beast has power to rule for the last three and one half years,and has power over all nations,kindreds,and tongues,and makes war against the saints,and prevails against them,and shall destroy the mighty and holy people,and they shall be given in to his hands for three and one half years,and when he has accomplished to scatter the power of the holy people then all things shall be finished.
So the wrath of God is not at the last three and one half years for the beast has power to rule for that time,and if the wrath of God was at that time then how does not beast have power to rule during that time,and the saints are still on earth.
At the end of the three and one half years all the saints that remain shall be gathered unto Christ,and then the wrath of God is poured upon the earth.