12:11 great mourning. When their national age-long sin is finally recognized and confessed, there will indeed be great mourning, but also great joy (Zephaniah 3:14-20).
12:11 Hadadrimmon. Hadadrimmon was a town in the valley of Megiddo (same as Armageddon). The last of the godly kings of Israel and Judah, good King Josiah, was slain by the Egyptian army at Megiddo (II Chronicles 35:20-25), and there was great mourning. There may also be a possible suggestion of great mourning at Armageddon over the multitudes slain there when Christ returns (Revelation 14:14-20).