Contradiction with Zechariah 2:10
Zechariah 9:5 describes fear in the cities, while Zechariah 2:10 encourages rejoicing and gladness.
Zechariah 2:10: Sing and rejoice, O daughter of Zion: for, lo, I come, and I will dwell in the midst of thee, saith the LORD.
Contradiction with Isaiah 2:4
Zechariah 9:5 speaks of panic and sorrow, whereas Isaiah 2:4 envisions peace and the end of warfare.
Isaiah 2:4: And he shall judge among the nations, and shall rebuke many people: and they shall beat their swords into plowshares, and their spears into pruninghooks: nation shall not lift up sword against nation, neither shall they learn war any more. [pruninghooks: or, scythes]