four chariots
The interpretation of the tenth vision must be governed by the authoritative declaration of (Zechariah 6:5). That which is symbolized by the four chariots with their horses is not the four world-empires of Daniel, but "the four spirits of heaven which go forth from standing before the Lord of all the earth" (Zechariah 6:5).
These "spirits" are angels; (Luke 1:19); (Hebrews 1:14) and are most naturally interpreted of the four angels of; (Revelation 7:1-3); (Revelation 9:14); (Revelation 9:15). These have also a ministry earthward, and of like nature with the "spirits" of (Zechariah 6:1-8). namely, judgment.
The symbol (chariots and horses) is in perfect harmony with this. Always in Scripture symbolism they stand for the power of God earthward in judgment. (Jeremiah 46:9); (Jeremiah 46:10); (Joel 2:3-11); (Nahum 3:1-7).
The vision, then, speaks of the Lord's judgments upon the Gentile nations north and south in the day of the Lord; (Isaiah 2:10-22); (Revelation 19:11-21).