Daniel 8:22

22 The four horns that replaced the one that was broken off represent four kingdoms that will emerge from his nation but will not have the same power.

Read Daniel 8:22 Using Other Translations

Now that being broken, whereas four stood up for it, four kingdoms shall stand up out of the nation, but not in his power.
As for the horn that was broken, in place of which four others arose, four kingdoms shall arise from his nation, but not with his power.
The four prominent horns that replaced the one large horn show that the Greek Empire will break into four kingdoms, but none as great as the first.