Dan 12:1 And at that time shall Michael stand up, the great prince which standeth for the children of thy people: and there shall be a time of trouble, such as never was since there was a nation even to that same time: and at that time thy people shall be delivered, every one that shall be found written in the book.
At that time, in the time of the end of satan's rule on earth, Michael the Archangel the spiritual high angel, opposite to satan in power shall stand up. He is God's good angel, the head angel as satan is the head of the evil spirits and fallen angels. Jesus is the Lord of hosts over Michael, he does not act alone, but is under the headship of Jesus, as we are. Michael is the protector of Israel, God's covenant people. This time of trouble is called the great tribulation.
Mat 24:21 For then shall be great tribulation, such as was not since the beginning of the world to this time, no, nor ever shall be.
A greater time of trouble then ever before. That means greater trouble then Hitler's Germany that exterminated six million Jews. The Jewish people will be targets of the full fury of the devil and his antichrist during this time, and will live in a world that is in incredible upheaval because of the judgment of God.
This is the time of Jacob's troubles, as prophesied by Jeremiah.
Jer 30:7 Alas! for that day is great, so that none is like it: it is even the time of Jacob's trouble; but he shall be saved out of it.
Jer 30:8 For it shall come to pass in that day, saith the LORD of hosts, that I will break his yoke from off thy neck, and will burst thy bonds, and strangers shall no more serve themselves of him:
Jer 30:9 But they shall serve the LORD their God, and David their king, whom I will raise up unto them.
...and at that time thy people shall be delivered, every one that shall be found written in the book.
The LORD has made an everlasting covenant with Israel. He keeps his promises.
Gen 17:7 And I will establish my covenant between me and thee and thy seed after thee in their generations for an everlasting covenant, to be a God unto thee, and to thy seed after thee.
Rom 11:25 For I would not, brethren, that ye should be ignorant of this mystery, lest ye should be wise in your own conceits; that blindness in part is happened to Israel, until the fulness of the Gentiles be come in.
Rom 11:26 And so all Israel shall be saved: as it is written, There shall come out of Sion the Deliverer, and shall turn away ungodliness from Jacob:
Rom 11:27 For this is my covenant unto them, when I shall take away their sins.
There is a condition to those who will be saved. Salvation is for those who are written in his book both Jew and Gentiles. I believe that most of the Gentiles who are saved will meet the Lord in the air before this time. Many Jews will die as martyrs during the tribulation, but they are not lost. They have received the Messiah, the Lord Jesus Christ.
Rev 7:14 And I said unto him, Sir, thou knowest. And he said to me, These are they which came out of great tribulation, and have washed their robes, and made them white in the blood of the Lamb.
Some shall be delivered in continuing on earth, others shall be delivered in death, being present with the Lord. Many believe that Jesus will come in a pre-tribulation rapture to gather the church. Michael comes with Jesus at this time. Some confuse Michael with Jesus. Jesus is the Lord of Hosts; Michael is the Archangel.
1Th 4:16 For the Lord himself shall descend from heaven with a shout, with the voice of the archangel, and with the trump of God: and the dead in Christ shall rise first:
1Th 4:17 Then we which are alive and remain shall be caught up together with them in the clouds, to meet the Lord in the air: and so shall we ever be with the Lord.
Another reference to the Archangel is found in Jude.
Jud 1:9 Yet Michael the archangel, when contending with the devil he disputed about the body of Moses, durst not bring against him a railing accusation, but said, The Lord rebuke thee.
The Lord Jesus Christ is a higher power than the angels. He is the Son of God.
Resurrected saints and the sons of Adam shall live on earth as Christ Jesus rules from Jerusalem. All shall be with the Lord for the thousand year reign on earth, some in spiritual bodies, some in fleshly bodies. It is too marvelous and wonderful for me to comprehend, fully. The Lord's ways are above our own, we shall continue to trust in him through it all.