That's too bad because scripture itself explicitly states much of it has happened and other parts of scripture tell us indirectly it has happened.
Rev. 1:19 explicitly states that John is to write down things he has (already seen). Those would be events that have already occurrs.
"I can't find anything in history that has showed Revelation has happened.... nor the Bible."
Then I cannot help you because verse 19 unequivocally reports events Joh wrote down were events he'd seen. It sounds to me like the first clause of verse 19 is being denied:
There isn't anything in Revelation the Bible shows has happened when the verse clearly states otherwise.
Rev, 1:19 also explicitly states John is to write down what is, meaning he is to write down circumstances and events existing and occurring at the time of his writing Revelation.
"I can't find anything in history that has showed Revelation has happened.... nor the Bible."
Well, again, verse 19 clearly states some of the events were taking place at the time John was writing the book. It sounds to me like both the first and the second clause of verse 19 are being denied:
There isn't anything in Revelation the Bible shows has happened when the verse clearly states otherwise.
Revelation 12:1-6
A great sign appeared in heaven: a woman clothed with the sun, and the moon under her feet, and on her head a crown of twelve stars; and she was with child; and she cried out, being in labor and in pain to give birth. Then another sign appeared in heaven: and behold, a great red dragon having seven heads and ten horns, and on his heads were seven diadems. And his tail swept away a third of the stars of heaven and threw them to the earth. And the dragon stood before the woman who was about to give birth, so that when she gave birth he might devour her child. And she gave birth to a son, a male child, who is to rule all the nations with a rod of iron; and her child was caught up to God and to His throne. Then the woman fled into the wilderness where she *had a place prepared by God, so that there she would be nourished for one thousand two hundred and sixty days.
Revelation 12:1-6 tells the reader a woman will give birth to a child who will rule all the nations with a rod of iron and the child will be caught up to God and His throne. The gospels of Matthew and Luke tell us of the birth of Jesus, who the gospels and the epistolary also tell us is the ruler of all things. If that woman described in Revelation 12 is Mary, the mother of Jesus then her existence has alll already come and gone. If those verses are not talking about Mary, then there will be some other woman giving birth to some other son who will be ruler of all the nations instead of Jesus. Jesus would then not be King of kings or Lord of lords. If Jesus is not the one ruling all the nations, then his own claim to have been given all power and authority and Paul's claim his rule is far above all other rules is dubious at best and an outright lie at worst.
Is Revelation 12 talking about the birth of Jesus, or not? Please do not avoid the question. Please do not beat around the bush, delay answering, change the subject, bring up some other verse or any other obfuscation. Please just answer the question asked: Are the opening verse of Revelation about the birth of Jesus mentioned in Matthew's and Luke's gospels or not?
Revelation 12:7-12
And there was war in heaven, Michael and his angels waging war with the dragon. The dragon and his angels waged war, and they were not strong enough, and there was no longer a place found for them in heaven. And the great dragon was thrown down, the serpent of old who is called the devil and Satan, who deceives the whole world; he was thrown down to the earth, and his angels were thrown down with him. Then I heard a loud voice in heaven, saying, "Now the salvation, and the power, and the kingdom of our God and the authority of His Christ have come, for the accuser of our brethren has been thrown down, he who accuses them before our God day and night. "And they overcame him because of the blood of the Lamb and because of the word of their testimony, and they did not love their life even when faced with death. "For this reason, rejoice, O heavens and you who dwell in them. Woe to the earth and the sea, because the devil has come down to you, having great wrath, knowing that he has only a short time."
Has salvation come?
Luke 19:9
And Jesus said unto him, This day is salvation come to this house, forsomuch as he also is a son of Abraham.
Romans 11:11
I say then, they did not stumble so as to fall, did they? Far from it! But by their wrongdoing salvation has come to the Gentiles, to make them jealous.
1 Peter 1:3-9
Blessed be the God and Father of our Lord Jesus Christ, who according to His great mercy has caused us to be born again to a living hope through the resurrection of Jesus Christ from the dead, to obtain an inheritance which is imperishable and undefiled and will not fade away, reserved in heaven for you, who are protected by the power of God through faith for a salvation ready to be revealed in the last time. In this you greatly rejoice, even though now for a little while, if necessary, you have been distressed by various trials, so that the proof of your faith, being more precious than gold which is perishable, even though tested by fire, may be found to result in praise and glory and honor at the revelation of Jesus Christ; and though you have not seen Him, you love Him, and though you do not see Him now, but believe in Him, you greatly rejoice with joy inexpressible and full of glory, obtaining as the outcome of your faith the salvation of your souls.
Three different books of the Bible clearly state salvation has come. What the loud voice in heaven said would appear to have already occurred by the time John heard those words in his vision.
"I can't find anything in history that has showed Revelation has happened.... nor the Bible."
The Bible states salvation has come. Unless you think Revelation 12: 's salvation is referencing some other kind of salvation (in which case the onus is on you to explain and then prove that case) verse' 10's salvation is a thing of the past and its coming continues on to this day.
Has the power and kingdom of God come?
Luke 1:35
The angel answered and said to her, "The Holy Spirit will come upon you, and the power of the Most High will overshadow you and, for that reason, the holy Child shall be called the Son of God.
Romans 1:1-4
Paul, a bond-servant of Christ Jesus, called as an apostle, set apart for the gospel of God, which He promised beforehand through His prophets in the holy Scriptures, concerning His Son, who was born of a descendant of David according to the flesh, who was declared the Son of God with power by the resurrection from the dead, according to the Spirit of holiness, Jesus Christ our Lord.....
Romans 1:16
For I am not ashamed of the gospel, for it is the power of God for salvation to everyone who believes, to the Jew first and also to the Greek.
1 Corinthians 1:18
For the word of the cross is foolishness to those who are perishing, but to us who are being saved it is the power of God.
1 Corinthians 1:18
For the word of the cross is foolishness to those who are perishing, but to us who are being saved it is the power of God.
1 Corinthians 2:3-5
I was with you in weakness and in fear and in much trembling, and my message and my preaching were not in persuasive words of wisdom, but in demonstration of the Spirit and of power, so that your faith would not rest on the wisdom of men, but on the power of God.
2 Corinthians 13:4
For indeed He was crucified because of weakness, yet He lives because of the power of God.
2 Timothy 1:7-8
For God has not given us a spirit of timidity, but of power and love and discipline. Therefore, do not be ashamed of the testimony of our Lord or of me His prisoner, but join with me in suffering for the gospel according to the power of God,
That is just a sampling of verses in the New Testament that speak of God's power having come to earth. At least five books of the Bible tell us the loud voice's proclamation salvation, and the power of God have come is something in Revelation that has already occurred.
"I can't find anything in history that has showed Revelation has happened.... nor the Bible."
Scripture clearly reports the power of God has come and describes it in diverse ways.
Has the authority of Christ come?
Matthew 9:6
"But so that you may know that the Son of Man has authority on earth to forgive sins"—then He said to the paralytic, "Get up, pick up your bed and go home."
Matthew 28:18
And Jesus came up and spoke to them, saying, “All authority in heaven and on earth has been given to me.
John 5:25-27
"Truly, truly, I say to you, an hour is coming and now is, when the dead will hear the voice of the Son of God, and those who hear will live. For just as the Father has life in Himself, even so He gave to the Son also to have life in himself; and He gave him authority to execute judgment, because he is the Son of Man."
John 17:1-2
Jesus spoke these things; and lifting up his eyes to heaven, he said, "Father, the hour has come; glorify Your Son, that the Son may glorify You, even as You gave him authority over all flesh, that to all whom You have given him, he may give eternal life.
1 Corinthians 15:20-25
But now Christ has been raised from the dead, the first fruits of those who are asleep. For since by a man came death, by a man also came the resurrection of the dead. For as in Adam all die, so also in Christ all will be made alive. But each in his own order: Christ the first fruits, after that those who are Christ's at His coming, then comes the end, when He hands over the kingdom to the God and Father, when He has abolished all rule and all authority and power. For He must reign until He has put all His enemies under His feet.
Ephesians 1:18-23
I pray that the eyes of your heart may be enlightened, so that you will know what is the hope of His calling, what are the riches of the glory of His inheritance in the saints, and what is the surpassing greatness of His power toward us who believe. These are in accordance with the working of the strength of His might which He brought about in Christ, when He raised Him from the dead and seated Him at His right hand in the heavenly places, far above all rule and authority and power and dominion, and every name that is named, not only in this age but also in the one to come. And He put all things in subjection under His feet, and gave Him as head over all things to the church, which is His body, the fullness of Him who fills all in all.
So, once again there are many books of the Bible that tell the reader the authority of God has, in fact, already come and, therefore, the loud voice's declaration in Rev. 12 has already happened.