Whereas the destruction of Damascus in Isaiah 17 can be right before or during the initial part of the Great Tribulation, the scriptures narrow the time frame of Gog/Magog:

Rev. 20:7 And when the thousand years are expired, Satan shall be loosed out of his prison, 8 And shall go out to deceive the nations which are in the four quarters of the earth, Gog, and Magog, to gather them together to battle: the number of whom is as the sand of the sea. 9 And they went up on the breadth of the earth, and compassed the camp of the saints about, and the beloved city: and fire came down from God out of heaven, and devoured them.

Is this not after the millennial period of 1000 years or am I somehow reading this passage wrong?

In Christ,

Mike