'Horns' in the Bible

Once again I looked and this time I saw four horns.

So I asked the angelic messenger who spoke with me, "What are these?" He replied, "These are the horns that have scattered Judah, Israel, and Jerusalem."

I asked, "What are these going to do?" He answered, "These horns are the ones that have scattered Judah so that there is no one to be seen. But the blacksmiths have come to terrify Judah's enemies and cut off the horns of the nations that have thrust themselves against the land of Judah in order to scatter its people."