Adam Clarke on Micah 4:8

O tower of the flock - I think the temple is meant, or Jerusalem; the place where the flock, the whole congregation of the people assembled to worship God. Newcome retains the Hebrew word עדר eder, a tower in or near Beth-lehem, Gen 35:21 or, as some think, a tower near the sheep-gate in Jerusalem, I believe Jerusalem, or the temple, or both, are meant; for these were considered the stronghold of the daughter-of Zion, the fortress of the Jewish people.

Even the first dominion - What was this? The Divine theocracy under Jesus Christ; this former, this first dominion, was to be restored. Hence the angel called him Immanuel, God with us, ruling among us.