What is the meaning of Zechariah 12:4?

* The two F.O.G. Bibles & Commentary below are currently a work in progress.

On that day, declares the LORD, I will strike every horse with panic, and every rider with madness. I will keep a watchful eye on the house of Judah, but I will strike with blindness all the horses of the nations.

Berean Standard Bible (BSB)

In that day,” says Yahweh, “I will strike every horse with terror, and his rider with madness; and I will open my eyes on the house of Judah, and will strike every horse of the peoples with blindness.

World English Bible (WEB)

In that day{H3117}, saith{H5002}{(H8803)} the LORD{H3068}, I will smite{H5221}{(H8686)} every horse{H5483} with astonishment{H8541}, and his rider{H7392}{(H8802)} with madness{H7697}: and I will open{H6491}{(H8799)} mine eyes{H5869} upon the house{H1004} of Judah{H3063}, and will smite{H5221}{(H8686)} every horse{H5483} of the people{H5971} with blindness{H5788}.

Strong's King James

In that day, declares יהוה Yahweh, "I will strike every horse with panic, and his rider with madness. But I will open My eyes for the house of Y'hudah, while I strike every horse of the peoples with blindness."

The F.O.G*

The F.O.G Paraphrase

In that day—an affirmation of Jehovah, I do smite every horse with astonishment, And its rider with madness, And on the house of Judah I open My eyes, And every horse of the peoples I smite with blindness.

Young's Literal Translation