Daniel 8:21

21 The goat represents the kingdom of Greece, and the prominent horn between his eyes is the first king.

Daniel 8:21 Meaning and Commentary

Daniel 8:21

And the rough goat is the king of Grecia
Including all the kings of it, from Alexander to the end of the Grecian monarchy; or rather the kingdom of Greece, which began in him, and continued until it was destroyed by the Romans: this was signified by the rough or hairy goat, especially when Alexander was at the head of it, for his strength and prowess, his swiftness in his marches over rocks and mountains, his majesty and grandeur, and also his lust and uncleanness; (See Gill on Daniel 8:5): and the great host that is between his eyes is the first king;
this is Alexander, who, though he was not the first king of Macedon, his father Philip, and others, were kings before him; yet was the first king of the Grecian monarchy, which took place on the Persian monarchy being destroyed by him.

Daniel 8:21 In-Context

19 and said, "I am showing you what the result of God's anger will be. The vision refers to the time of the end.
20 "The ram you saw that had two horns represents the kingdoms of Media and Persia.
21 The goat represents the kingdom of Greece, and the prominent horn between his eyes is the first king.
22 The four horns that came up when the first horn was broken represent the four kingdoms into which that nation will be divided and which will not be as strong as the first kingdom.
23 "When the end of those kingdoms is near and they have become so wicked that they must be punished, there will be a stubborn, vicious, and deceitful king.
Scripture taken from the Good News Translation - Second Edition, Copyright 1992 by American Bible Society. Used by Permission.