Battle of Armageddon
The Battle of Armageddon is a battle prophesied to occur on or around Megiddo in Israel according to the Book of Revelation in the Bible. At Megiddo, the Antichrist will summon forth his mortal and demonic armies to challenge the Lord's authority. God will strike him and his master, the fallen angel Lucifer, and end his dominion over the earth, ushering in the Millennial Reign.
Jehovah's Witnesses believe that Armageddon is the means by which God will finally realize his purpose for the Earth to be populated with happy healthy Humans free of Sin and Death(Psalms 37:29) (Matthew 6:9-10) or have his Will be done.  They teach that the armies of Heaven will eradicate all who oppose the Kingdom of God and it's rule, essentially wipeing out all wicked Human and Spirit creatures on Earth, leaving only righteous mankind.
Jehovah's Witnesses believe that the Gathering of the all the Nations of the Earth refers to the Uniteing of the worlds Political powers, and that this is gradual, begining in 1914 and seen later in such manifestations as the League of Nations, and the United Nations, after World War's one, and two. This gathering, they teach, is a symbolic one, of coming together as one, and existing in opposition to The Kingdom of God. This is done by inspiration of Satan and his Demons who rule the world under his control.
Jehovah's Witnesses teach that the armies of Heaven, commanded by Jesus Christ, will destroy all forms of Human/Self government and rule the Earth for 1000 years.  Satan is said to be bound for 1000 years, and unable to influence mankind until the 1000 years are up. After the 1000 years are ended, and the Second Resurrection has taken place, Satan is let loose from the Abyss and allowed to tempt a perfect human race one last time. Those who follow Satan are destroyed, along with him, leaving the Earth, and Mankind at peace with God forever, and free of Sin and Death.
- Armageddon - A Happy Beginning
- Armageddon—God’s War to End All Wars
- "What Does the Bible Really Teach" pp. 215-218 '1914—A Significant Year in Bible Prophecy'
- The Watchtower 12/1/05 p. 4 Armageddon—A Happy Beginning Watch Tower Bible and Tract Society of Pennsylvania
- The Marvelous New World of God's Making watchtower.org
- Watchtower 6/1/96 p. 18 par. 20 "Flight to Safety Before the "Great Tribulation"" Watch Tower Bible and Tract Society of Pennsylvania