Gospel of Jesus Christ was a historical event

Deuteronomy 1:3-5 (ESV)
In the fortieth year, on the first day of the eleventh month, Moses spoke to the people of Israel according to all that the LORD had given him in commandment to them, [4] after he had defeated Sihon the king of the Amorites, who lived in Heshbon, and Og the king of Bashan, who lived in Ashtaroth and in Edrei. [5] Beyond the Jordan, in the land of Moab, Moses undertook to explain this law, saying,

In the fortieth year, on the first day of the eleventh month. In the first five verses of this chapter God gives us the exact location in the world (Deuteronomy 1:1) and the exact date (1st day of 11th month) and timeframe (after defeat of Sihon and Og) of when Moses spoke the words of Deuteronomy. This is to mainly stress that this was really a historical event. Moses really spoke these words on this specific day and in this specific spot in the land of Moab. This truly happened. And by putting in this location and date stamp as preface, God gives no room for Israel doubting whether these words were really spoken by Moses or not. No one could ever say in the future that these were only some words written by a group of rabbis who decided come up with a religion. For Moses says later:
Deuteronomy 31:24-26 (ESV)
When Moses had finished writing the words of this law in a book to the very end, [25] Moses commanded the Levites who carried the ark of the covenant of the LORD, [26] "Take this Book of the Law and put it by the side of the ark of the covenant of the LORD your God, that it may be there for a witness against you.

Moses commanded that the book that contains words of the Law, the original handwritten copy of it, be placed next to the ark of the covenant in the tabernacle. And the ark of the covenant is in the Holiest of Holies, beyond the second curtain of the temple, to which no one can enter lest they die because of God's holy presence. Only the High Priest can enter there once a year, but not without the blood of atonement, lest he also die. By preserving this book in the Holiest of Holies, it meant that NO ONE could temper with the words that Moses wrote, from Genesis to Deuteronomy, and no one could write off the Law as something that was made by man, or claim that they were never spoken. If they were ever in doubt, they could go in the holiest of holies and read the original text written by Moses, preparing to die as they do it.

These words that Moses spoke was a witness against Israelites, giving them no excuse to disobey them nor think of them as mere empty words. As Moses says later:
Deuteronomy 31:28-29 (ESV)
Assemble to me all the elders of your tribes and your officers, that I may speak these words in their ears and call heaven and earth to witness against them. [29] For I know that after my death you will surely act corruptly and turn aside from the way that I have commanded you. And in the days to come evil will befall you, because you will do what is evil in the sight of the LORD, provoking him to anger through the work of your hands."
Moses clearly swore upon heaven and earth that if Israel disobey God's commandments, they will perish. And they did perish, when they were carried all the Babylon. The future generation took Moses' words lightly, disrearding the warnings therein, perhaps thinking Moses never really wrote these words, or that Law was only the invention of man. Yet all the time while they are doubting the original copy of the Bible and the tablets of stone on which He wrote the Ten Commandments by His own finger was sitting in the Holiest Holies, giving witness against them, bringing accusation against them before God.

Likewise, the Gospel of Jesus Christ is also a historical event that actually happened. We know that Christ was born in Bethlehem Judea (Matthew 2:1) of the Roman Empire, that it was during the reign of Caesar Augustus (Luke 2:1), when Quirinius was the governor of Syria (Luke 2:2), during the reign of Herod over Judea (Matthew 2:1), and that becase of Herod He fled to Egypt, and later returned from there to the land of Judea during the reign of Archelaus the son of Herod (Matthew 2:22). And we know where He was raised; in the city of Nazareth, which is in the district of Galilee (Matthew 2:22-23) and that He was there until the beginning of His ministry, which went on for three years after the 15th year of the reign of Tiberius Caesar, Pontius Pilate being governor of Judea, and Herod being tetrarch of Galilee, and his brother Philip tetrarch of the region of Ituraea and Trachonitis, and Lysanias tetrarch of Abilene, during the high priesthood of Annas and Caiaphas (Luke 3:1-2).

And we know where and when our Lord Jesus Christ was betrayed, tortured and crucified for sinners. It was in Jerusalem, on the night of the Passover, the first day of the feast of the Unleavened Bread, that Jesus was betrayed by Judas and arrested, in a place called Gethsamane on the Mount of Olives. On the next day, after being condemned by Jewish leaders, he was led to Pilate's headquarters, and mocked, beaten and scourged by a Roman battalion. And after being sentenced to death by Pilate, He was taken to the hill of Golgotha, or Calvary, the 'place of a skull', where He was crucified in the midst of two criminals, carrying the shame and the guilt of our sins, crushed under the wrath and curse of God against our sins. And the Bible even tells us the time of His death, which was about the ninth hour - at 3pm:
Mark 15:33-37 (ESV)
And when the sixth hour had come, there was darkness over the whole land until the ninth hour. [34] And at the ninth hour Jesus cried with a loud voice, "Eloi, Eloi, lema sabachthani?" which means, "My God, my God, why have you forsaken me?" [35] And some of the bystanders hearing it said, "Behold, he is calling Elijah." [36] And someone ran and filled a sponge with sour wine, put it on a reed and gave it to him to drink, saying, "Wait, let us see whether Elijah will come to take him down." [37] And Jesus uttered a loud cry and breathed his last.

So it was on Friday 3pm, the day before the Sabbath, that Jesus Christ died. And Christ was buried in a garden that was close by Calvary (John 19:42) on that same day. And it was on Sunday morning, the first day of the week, before the rising of the Sun (Matthew 28:1), that Jesus Christ rose from the dead. He showed Himself to His disciples on that day to His two disciples on the road to Emmaus (Luke 24:13-15), on that evening to the apostles that were in Jerusalem apart from Thomas (John 20:24). And eight days later He showed Himself again to the disciples with Thomas (John 20:26). After 40 days of being with the disciples (Acts 1:3) Christ ascended to Heaven on the Mount of Olives, which is at Bethany, to remain there on the right hand of the Father, and to return to Judge every person for their sins.

If then there are so many witnesses in scripture, that testifies of exactly when and where in the world Christ lived, died, rose again, and ascended, where is the room for doubts? The Gospel was a historical event that took place, and Christ's witnesses have wrote this in a book, and have gave their lives proclaiming it. It was not that Christ's disciples had blind faith and false hope that they did this, but they had too much evidence to deny the truth of Christ's life, death and resurrection. As Peter said to the Jewish leaders:
Acts 4:20 (ESV)
for we cannot but speak of what we have seen and heard.
This was a real event that took place, some 2000 years ago, and the Scriptures stand as a witness against all of Earth's inhabitants. Just as Moses placed his writing of the law in the Holiest of Holies to be untainted by man, and to stand as witness before God, Jesus Christ, the living Son of Man and Son of God, has also entered into Heaven, to the only holy place where God dwells, to be witness before God against all who do not obey the Gospel, and those who twist the Gospel for their own gain. Jesus Christ the Witness is watching from heaven, keeping record against all who do not believe in His Good News.

God has also proclaimed the Gospel to you, through a cloud of witnesses who shed rivers of blood to preserve and preach this News of what God has done for you in Jesus Christ. If you are reading this, and you have not yet trusted in Jesus Christ's blood and His resurrection as your only hope before God on Judgment Day, please do so now. You have no time, for tommorow you may die and wake up in the flames of Hell. If you have believed, then you and I ought to continue to believe in Him, and be sure again of the certainty of our salvation which Jesus Christ has accomplished on the cross. It is Jesus who proclaimed, before His death:
John 19:30 (ESV)
When Jesus had received the sour wine, he said, "It is finished," and he bowed his head and gave up his spirit.
Let us trust His words, that it is done, that Christ has done what we could not do, and believe that what He has done for us is enough to take us to Heaven with Him. Let us rest in Him, and everlasting truth of His Gospel. Amen.