Therefore, thou son of man, prophesy against Gog, and say, ‘Thus saith the Lord GOD; ‘Behold, I am against thee, O Gog, the chief prince of Meshech and Tubal: and I will turn thee back, and leave but the sixth part of thee, and will cause thee to come up from the north parts, and will bring thee upon the mountains of Israel: and I will smite thy bow out of thy left hand, and will cause thine arrows to fall out of thy right hand. Thou shalt fall upon the mountains of Israel, thou, and all thy bands, and the people that is with thee: I will give thee unto the ravenous birds of every sort, and to the beasts of the field to be devoured. Thou shalt fall upon the open field: for I have spoken it,’ saith the Lord GOD. ‘And I will send a fire on Magog, and among them that dwell carelessly in the isles: and they shall know that I am the LORD. So will I make My holy name known in the midst of My people Israel; and I will not let them pollute My holy name any more: and the heathen shall know that I am the LORD, the Holy One in Israel.'” Ezekiel 39:1-7 (KJV)
God honors His Word. It will come to pass just as He says.