Passage
And Judah also shall fight at Jerusalem; and the wealth of all the nations round about shall be gathered together gold, and silver, and garments, in great abundance.
And Judah also shall fight at Jerusalem; and the wealth of all the nations round about shall be gathered together gold, and silver, and garments, in great abundance.
Zechariah 14:12 And this shall be the plague wherewith Jehovah will smite all the peoples that have warred against Jerusalem: their flesh shall consume away while they stand upon their feet, and their eyes shall consume away in their holes, and their tongue shall consume away in their mouth.
Zechariah 14:13 And it shall come to pass in that day [that] a great panic from Jehovah shall be among them; and they shall lay hold every one on the hand of his neighbour, and his hand shall rise up against the hand of his neighbour.
Zechariah 14:14 And Judah also shall fight at Jerusalem; and the wealth of all the nations round about shall be gathered together gold, and silver, and garments, in great abundance.
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 this plague.
Zechariah 14:16 And it shall come to pass, that all that are left of all the nations which came against Jerusalem shall go up from year to year to worship the King, Jehovah of hosts, and to celebrate the feast of tabernacles.
The verse centers on "judah", "shall", "fight", "jerusalem", "wealth", "nations", and "round". It is saying that the verse draws attention to "judah" and "shall", so its meaning should be read from those terms before moving to application.
The nearby context moves from verse 13's "And it shall come to pass in..." into verse 15's "And so shall be the plague of...", so "judah" and "shall" belong inside that flow. In Zechariah context, the local focus is covenant, worship, and faithfulness.
A plain takeaway is to answer the verse's own emphasis on "judah" and "shall" with trust shaped by these words, not by a vague optimism outside the passage.