“The blacke horses which are therin, goe forth into the North countrey, and the white goe forth after them, and the grisled goe forth toward the South countrey.”
1611 King James Version (KJV)
6:6 The black horses - The angels signified by the black horses are the executioners of God's just displeasure. Therein - In the second chariot. The north - country - Babylon. The grisled - The angels signified by these, managed the Roman power, which was sometimes favourable, sometimes fierce and severe, to those they had to do with. The south - country - Egypt and Arabia, which lay south of Judea. It may perhaps point at their invading Africa too, whose punishments were mixed, with kindness and mercy more than the punishments of Babylon were.