The Bible does NOT indicate "A" or "THE" great tribulation. Strong's Concordance confirms this. Nowhere in the Bible can you find (KJV) a or the great tribulation. Why? I believe it's because "great tribulation" is NOT limited to any single event or period throughout history. But is what the church on earth is called to endure throughout all ages, especially as the time of Christ' coming again grows nearer.
The Olivet Discourse was not spoken for ethnic Jews, warning the nation of Israel what shall soon befall them through apostasy. The Discourse is spoken to the first disciples of Christ, who at that time were, Messianic or Christian Jews. Christ is warning Christians, beginning with them, as well as all faithful Christians throughout the ages until the end of the final age about all that shall befall the church as faithful disciples preach the Gospel of the Kingdom of God through Christ.
The destruction of the Jewish city and temple was not the primary focus of the Discourse. That's why when they ask Christ about the destruction, He only says it will be utterly destroyed.
Revelation 7
4 I answered, “Sir, you know.”
And he said, “These are they who have come out of the great tribulation; they have washed their robes and made them white in the blood of the Lamb.
Well it does but the word "The" separates it from other great tribulations