The Battle of Armageddon is the battle prophesied in Scripture where the Antichrist will gather up his armies to make war with Jesus Christ as He appears from heaven with His army of saints. In the book Armageddon, Nicolae Carpathia amasses troops in the Valley of Megiddo called the Unity Army in the hopes of storming both Petra and Jerusalem in addition to destroying Jesus. However, the battle turns against Nicolae in Glorious Appearing when Jesus uses "the sword of His mouth" to slay His enemies en masse, causing great casualties and eventually spelling defeat for Nicolae. (The "sword of His mouth" is meant to be symbolic for the Word of God, or Scripture. Evidence of this is written in Ephesians 6:17: "...the sword of the Spirit, which is the Word of God" and in Glorious Appearing, Chaim Rosenzweig cites Hebrews 4:12 in an address to the Remnant in Petra.)
Those slayed by the "sword" would have their corpses become a part of the Great Supper of God where birds would feed upon them.