Below is the dried riverbed of the Euphrates. This drying is caused by drought and by other nations rerouting the river. But in Revelation, an angle will pour out the bowl of judgment that will dry up the Euphrates so that all the kings and their armies can cross the river on dry land and come to the final battle: Armageddon. They think they will finally destroy Israel, but they will be slaughtered instead. Once that battle has been fought and the great harlot, Babylon finally and forever falls, Jesus will come in great glory and the rest of all prophecy will be played out.