I guess we have only Watchtower "reasoning" on the matter.. How does one understand or interpret the Revelation? ..This is what they used to say, although I have not seen a recent specific statement, but then again I am a little out of touch .
**
w60 4/15 p. 249 Part 36: "Your Will Be Done on Earth" ***The main one behind this shattering of Jehovah’s holy ones was Satan the Devil, who claims possession of all the kingdoms of this world and their glory. (Matt. 4:8, 9; Luke 4:5, 6) In 1914, when Michael stood up, the war in heaven was begun to oust the Devil and his demons. He was defeated by Michael, and there is Scriptural reason to believe that by the time of the annual celebration of the Lord’s evening meal on March 26, 1918, Satan the Devil was hurled down to the earth. For the reason that he now knows that he has yet a "short period of time" before he is bruised in the head in the battle of Armageddon, he has great anger, especially against the remnant of the sanctuary class. On these he has waged war by all means at his disposal. (Rev. 12:7-17) But to this date he has failed to show the power to shatter that he was permitted to show in 1918. Neither will he shatter Jehovah’s sanctuary in their "beauteous land" when he plays the part of Gog of Magog and comes down from the north with all his visible and invisible hosts to destroy the holy remnant and the "other sheep." He himself will be bruised. His power to shatter has come to an end.—Ezek. 38:1 to 39:16.