Revelation was fulfilled with the fall of Jerusalem AD70.

WHEN WOULD THEY SAY TO THE MOUNTAINS “FALL ON US” AND TO THE HILLS “COVER US”?
Isaiah 2:2 The word that Isaiah the son of Amoz saw concerning Judah and Jerusalem. 2 Now it shall come to pass in the latter days (“last days” KJV) 10 Enter into the rock, and hide in the dust, From the terror of the LORD…19 They shall go into the holes of the rocks And into the caves of the earth,…From the terror of the LORD And the glory of His majesty, When He arises to shake the earth mightily.
Notice again the context here… the latter days, the last days is associated with the day of the Lord, a day of judgment for the proud and haughty and lofty would also be a time when the mountain of the Lord’s house, which is the kingdom of God, will be exalted above the hills which are the little kingdoms and nations.
Jesus applied this passage to HIS day, not a future day.
In Luke 23 Jesus is being led to his death and he turns to the women who are weeping for him and this is what he said,
“27 And a great multitude of the people followed Him, and women who also mourned and lamented Him. 28 But Jesus, turning to THEM, said, “Daughters of Jerusalem, do not weep for Me, but weep for YOURSELVES and for YOUR children. 29 For indeed the days ARE COMING in which they will say, ‘Blessed are the barren, wombs that never bore, and breasts which never nursed!’ 30 Then they will begin ‘to say to the mountains, “Fall on us!” and to the hills, “Cover us!”’
THEN…
Revelation 6:15 Then the kings of the earth and the great men and the commanders and the rich and the strong and every slave and free man hid themselves in the caves and among the rocks of the mountains; 16 and they said to the mountains and to the rocks, “Fall on us and hide us from the presence of Him who sits on the throne, and from the wrath of the Lamb; 17 for the great day of their wrath has come, and who is able to stand?”
What Isaiah calls the last days, Jesus says is coming soon TO THEM in THEIR DAY, and then the same thing is said in Revelation BECAUSE it all refers to the same event.
Revelation has been fulfilled in the fall of Jerusalem in AD70.
Chuck Crisco