16 So they assembled them at the place called in Hebrew, Armagedon.
This verse points back to the prophecy that was mentioned in Ezekiel 38:1-8, where the Muslim world and most likely Russia, will come down to attack Isreal. Isreal today has natural gas which is as valuable or even more than oil.
17 Then the seventh poured out his bowl into the air, and a loud voice came out of the sanctuary from the throne, saying, “It is done!”
Now the scene switches back to the angel with the seventh (last and final) bowl. The bowl was to announce that it is accomplished, that is, God’s wrath on humanity with the last one as seen in verse 18.
18 There were flashes of lightning and rumblings of thunder. And a severe earthquake occurred like no other since man has been on the earth—so great was the quake.
The announcement of the seventh bowl brought about the worst and never seen before, the biggest earthquake known to men.
19 The great city split into three parts, and the cities of the nations fell. Babylon the Great was remembered in God’s presence; He gave her the cup filled with the wine of His fierce anger.
“The great city” is a reference to Babylon the Great.
The phrase “the cities of the nations fell” could either mean that the earthquake devasted the nations that surrounded the city of Babylon as well or that financially their economy fell alongside the destruction of a city who bought most of their merchandise.
The phrase “Babylon the Great was remembered in God’s presence” shows that God will not forget those who kill His saints and deceived the world through false doctrine and encouraged them to follow other gods.
20 Every island fled, and the mountains disappeared.
The earthquake was so grand that it moved or sank islands and made mountains crumble.
21 Enormous hailstones, each weighing about 100 pounds, fell from the sky on people, and they blasphemed God for the plague of hail because that plague was extremely severe.
Hailstones weighing 100 lbs could penetrate the roof of people houses. There was no refuge found from God’s wrath for those in its direct path. Instead of repenting from their sins (for those who witnessed it), the opposite occurred.
The probability of surviving the plague of hailstones was slim to none.
As they fled before Israel, the LORD threw large hailstones on them from the sky along the descent of Beth-horon all the way to Azekah, and they died. More of them died from the hail than the Israelites killed with the sword.