There is evidence available now, not available to Ralph H. Alexander.
From the Assyrian Court records we know Magog was a people (a nation) along with Meshech, Tubal, and Togarmah [Eze 38:3-6] who the Assyrians had dealings with. They were nations stretching across the so-called fertile crescent, including ancient Asia Minor from west to east.
These records show ancient Gomer [Eze 38:6], an enemy of the Assyrians invading Asia Minor by coming down from an area around the northeast shore of the Black Sea. Archaeologists know the militant leader called “Gog” in [Eze 38/39] leading a confederacy of these nations against the invading Gomer.
Gog was the historical leader the Greeks called 'Gyges of Lydia'. This Gyges of Lydia was known to the Assyrians as “Gugu, King of Ludu” and “Gugu of Magugu" which is equivalent to the Bible's reference 'Gog of Magog'. In Akkadian 'ma' means 'land', so in Akkadian "Ma-gugu" means “the land of Gugu” which becomes our Ma-gog. “Magog” means “the land of Gog”.
Ralph H. Alexander was forced to spiritualize historical references he didn't understand, but scholarship and specifically Assyriology have come along way in 40 years saving us from the dangerous practice of taking these references too figuratively.
So, back to your question:
The nations Satan comes out to deceive at the four corners of the earth [Rev 20:7] are the nations of the House of Israel YHWH first scattered TO the four corners of the earth [Deut 4:27; 28:64; 32:26], [Isa 11:12], [Jer 23:8]:
[Isa 11:12] - He will raise a signal for the nations and will assemble the banished of Israel, and gather the dispersed of Judah from the four corners of the earth.
The sifting of these Israelite nations to the four corners of the world is described here:
[Isaiah 30:27-28] - Behold, the name of the LORD comes from afar, burning with his anger, and in thick rising smoke; his lips are full of fury, and his tongue is like a devouring fire; his breath is like an overflowing stream that reaches up to the neck; to sift the nations with the sieve of destruction, and to place on the jaws of the peoples a bridle that leads astray.
Also:
[Amos 9:9] - For behold, I will command, and shake the house of Israel among all the nations as one shakes with a sieve, but no pebble shall fall to the earth.
So the deceit Satan has planned has the nations of the House of Israel and and the nations of the land of Gog andof Magog (of Asia Minor and of the North, meaning historically North of the Caucasus) being deceived so they wage war with one another.
So the war withwill be between the House of Israel and those of the land of Gog andof Magog.