Joel 3’s valley of decision points to God’s end-time judgment of the nations, closely tied to Armageddon and Christ’s return in judgment.
Joel warns of judgment, calls for true repentance, and promises restoration, Spirit outpouring, and the future reign of the Lord in Zion.
Revelation 6 explains the Four Horsemen as the first Tribulation judgments: false peace, war, famine, and mass death.