LOL. You know what we know: there is no trib period in 1 Thess 4. It is a Pretrib invention. You divert to Luke 21, that also doesn't have a trib period following. You are unable to quote any trib detail in these. That is because it does not exist. You force your false teaching into the text where there is no mention of a trib.Luke 21
36 Watch ye therefore, and pray always, that ye may be accounted worthy to escape all these things that shall come to pass, and to stand before the Son of man.
We can escape all these things which come to pass during the tribulation shown in Luke 21, Matthew 24 and Mark 13.
In Luke 21:33-36 Christ declares: “Heaven and earth shall pass away: but my words shall not pass away. And take heed to yourselves, lest at any time your hearts be overcharged with surfeiting, and drunkenness, and cares of this life, and so that day come upon you unawares. For as a snare shall it come on all them that dwell on the face of the whole earth. Watch ye therefore, and pray always, that ye may be accounted worthy to escape all these things that shall come to pass, and to stand before the Son of man.”
So, "they (the wicked) shall not escape" the "sudden destruction" that accompanies Christ's return, but we (the redeemed) are "accounted worthy to escape." It will come upon the rebel "unawares." This is describing the same climactic event. It is the end. Men are either ready or caught unexpectedly; they are caught up or caught on. They are either saved or lost. It is now eternal bliss or eternal torment.
Christ is exhorting His listeners here to be ready for His return, and warning that He will pour out His wrath upon all mankind who are not prepared, ready and rescued. This is the time when the heavens and the earth shall pass away.
The phrase "all these things" (that Pretribbers keep getting tripped up on every time this is discussed) is not everything the Left Behind novels have taught them (including some imaginary future 7-year trib), it is talking about the total destruction and removal of the wicked and current corrupted creation. Read what the text is actually saying.
The words of Christ in Luke 21:33-36 agree with 1 Thessalonians 4:15-5:9 and prove the coming of Christ is final and climactic. It sees the rescue of all the elect and the sudden destruction of all the wicked. It ushers in the end of the world. The escape is indeed the catching away that occurs before the wrath of God is poured out when Jesus comes, when heaven and earth pass away, when creation is regenerated and all the wicked are destroyed.