The Battle of Armageddon is not to be confused with the Final Rebellion of Satan at the end of the Millennium
Rev 20:7-10 When the thousand years are over, Satan will be released from his prison and will go out to deceive the nations in the four corners of the earth—Gog and Magog—to gather them for battle. In number they are like the sand on the seashore. They marched across the breadth of the earth and surrounded the camp of God’s people, the city he loves. But fire came down from heaven and devoured them. And the devil, who deceived them, was thrown into the lake of burning sulfur, where the beast and the false prophet had been thrown. They will be tormented day and night for ever and ever.
The final rebellion of Satan in Revelations 20:7-10 at the end of the Millennium is NOT the battle of Armageddon.
The battle of Armageddon is when the Beast and the False Prophet are defeated. Satan is thrown into the Abyss where he is bound for one thousand years.
After the 1000 years are over, Satan is released for a short period but rebels once again.
Is God going to give the Devil a second chance? Well, God already knows what the outcome will be. He will rebel again! He will go out to the Ends of the Earth once again to stir up trouble for God’s people. Fire comes down from heaven and defeats the nations that surround the camp of God’s people and Satan is thrown into the Lake of Fire which is the Second Death.
This Rebellion occurs at the end of the Millennium. Satan is thrown into the Lake of Fire which is the Second Death.
The Lake of Fire is where the Beast and the False Prophet were thrown when they were defeated at Armageddon prior to the Millennium starting.
Satan's Final Rebellion and Judgment 