Charles Ellicott Commentary Zechariah 14:15

"And so shall be the plague of the horse, of the mule, of the camel, and of the ass, and of all the beasts that shall be in those camps, as that plague." — Zechariah 14:15 (ASV)

The war-horse (see Note on Zechariah 9:9) and beasts of burden (see Note on Zechariah 9:9) are to be included in the destruction, even as were the cattle of Achan (Joshua 7:24).