Revelation 17:12-14

These verses tell us about the horns of the beast. He had not only seven heads; but ten horns. These ten horns were ten kings, not kings sitting on the throne of Rome, as I understand, but those kings and countries subjected by Rome, and which made the empire great. We know that Rome embraced at that time the countries of Europe that bordered on the Mediterranean Sea, and the northern part of Africa and considerable territory in Asia, and also in central Europe. Rome had conquered the world.

It is further said of these horns or subsidiary nations, "They give their power and strength unto the beast." Yes this they did for a while, but wait and see. By and by these horns turn against her. But in the meantime, these horns shall make war with the Lamb; they joined in persecuting the church, and strengthened the government against Christianity. "But the Lamb shall overcome them." All the powers of the empire were joined to crush the Christian church, but the church came off victorious. The leaven was in the lump and eventually leavened the whole lump.