Revelation 9:16

The number of the troops of cavalry was two hundred million; I heard their number.

Revelation 16:12

The sixth angel poured out his bowl on the great river Euphrates, and its water was dried up, to prepare the way for the kings from the East.

Treasury of Scripture Knowledge

Summary

And at the time of the end shall the king of the south push at him: and the king of the north shall come against him like a whirlwind, with chariots, and with horsemen, and with many ships; and he shall enter into the countries, and shall overflow and pass over.

Bible References

With horsemen

Revelation 9:16
The number of the troops of cavalry was two hundred million; I heard their number.
Revelation 16:12
The sixth angel poured out his bowl on the great river Euphrates, and its water was dried up, to prepare the way for the kings from the East.