What does Psalm 46:8 mean?

Scripture is not clear if some unique event inspired this song of praise. Similarities between phrases in this psalm and the writings of Isaiah suggest it might have been written, or at least commissioned, by king Hezekiah. During his reign, the kingdom of Assyria attempted to conquer Jerusalem, only to be supernaturally annihilated by God (2 Kings 19:35). After 185,000 troops were destroyed, the invaders fled without harming the city (2 Kings 19:36). Thanks to God's unending supply of protection, the city was saved from certain doom (Psalm 46:1–7).

In that instance, at least, the people of Israel did not have to fight for themselves. The Lord came to their defense. This situation previewed what will happen at the end of the millennium: the thousand-year reign of Christ. The Devil will be released from the bottomless pit and will deceive the nations from around the world. Those militant anti-Christ nations will surround Jerusalem, called "the camp of the saints" and "the beloved city" (Revelation 20:7–9). However, God will come to Jerusalem's defense. He will rain fire from heaven upon the marching armies and consume them. The judgment ends the Devil's wicked activity on earth. He is thrown into the lake of fire to be tormented forever and ever (Revelation 20:10).