I will overthrow the throne of kingdoms. No events in Zerubbabel's time satisfied this prediction, which waits for its fulfilment in the Messianic age (Luke 1:52). "The throne" is used distributively for "every throne of kingdoms;" Septuagint, "thrones of kings."
Of the heathen; of the nations. Chariots, etc. Emblems of the military power by which the nations had risen to eminence (Psalms 20:7; Zechariah 10:5). Shall come down. Be brought to the ground, perish (Isaiah 34:7).
By the sword of his brother. The heathen powers shall annihilate one another (Ezekiel 38:21; Zechariah 14:13).