And he gathered them . . More probably, and they [the unclean spirits] gathered them. The sentence goes on from the end of v. 14, v. 15 being strictly parenthetical. - CBSC
they gathered them . . Apparently in the sense that they gathered themselves together, or assembled at this location.
called in Hebrew . . But the insertion of “in the Hebrew tongue” perhaps indicates, that the meaning of the name Megiddo (which is apparently “cleaving”) is more important than the geographical note. - CBSC
Armageddon . . Harmagedon -- Har-Magedon -- This word is spelled differently in several Greek manuscripts. There have been several theories to describe this name (which appears nowhere else in Hebrew or Greek literature): - Utley
"Ar" = the city of, (KJV); or "Har" = Mountain of, (RSV).
Only time Armageddon is mentioned in all the Bible is here. Mt or hill of Megeddo. The most prominent place of battle in the O.T. times.
Judges 5:19 * Deborah
Judges 6:33; Judges 7:1 * Gideon
1 Samuel 31:8 * Saul killed
2 Kings 9:27 * Jehu slew Ahaziah there
2 Kings 23:28-29 * Josiah killed by Pharaoh Neco
Megeddo = symbolized where righteousness and unrighteousness fought. To say "Armageddon" was like us speaking of "The Alamo", "Waterloo" and "Pear Harbor", "Remember the Main!" Normandy"
Armageddon . . The spelling which has the best authority is “Harmagedon.” The meaning, according as we read Ar or Har, is “the City” or “the Mountain of Megiddo.”
But the insertion of “in the Hebrew tongue” perhaps indicates, that the meaning of the name Megiddo (which is apparently “cleaving”) is more important than the geographical note.
There is some truth (though some exaggeration) in the description of the plain of Esdraelon as “the battle-field of Palestine:” but the only occasions when Megiddo is mentioned in connexion with a battle are Judges 5:19, 2 Kings 23:29 (cf. Zechariah 12:11). Of course Megiddo or its neighbourhood (“the Mountain of Megiddo” might be Tabor or that conventionally called Little Hermon) - CBSC
Armageddon . . “Mount Megiddo” in Hebrew.
Megiddo, also called the Plain of Megiddo (2 Chronicles 35:22; Zechariah 12:11), was an ancient city that Solomon fortified (1 Kings 9:15). Megiddo was strategically located along the main highway from Egypt to Syria in the Jezreel Valley and was the site of key battles (Judges 5:19-21; 2 Kings 23:29) - NIVZSB
Armageddon . . The Greek word used here, harmageddōn, could be a reference to Megiddo in the Esdraelon plain, but this is not definitive since Megiddo is a plain, not a mountain (the first part of the Greek word, har, is Hebrew for “mountain”). In the ot, Megiddo was the site of significant conflicts (e.g., Judges 5:19; 2 Kings 9:27; 2 Chronicles 35:22).
John may be drawing on a well-known battle site to indicate symbolically the final conflict between God and the dragon, as he has elsewhere drawn on the symbolism associated with Babylon (see Rev 14:8 and note) and Mount Zion (see Revelation 14:1 and note) - FSB
Armageddon . . The Heb. name for Mt. Megiddo, 60 mi. N of Jerusalem. The battle will rage on the nearby plains, site of Barak’s victory over the Canaanites (Judg. 4), and Gideon’s victory over the Midianites (Judg. 7). Napoleon called this valley the greatest battlefield he had ever seen. - MSB
The name Armageddon (or Harmagedon) is probably derived from har (“mountain,” “hill”) plus Megiddo, which was one of the three cities fortified by Solomon along with Gezer in the south and Hazor in the north (1 Kings 9:15). The fortress of Megiddo stood on a hill in the largest pass through the Carmel range, strategically guarding the Jezreel Valley. The city was situated on the Via Maris, the main highway between Egypt and Mesopotamia. Many armies used this route, and the site became known as a bloody battlefield. It was here, for instance, that Pharaoh Neco, on his way to fight the Assyrians, killed Josiah (2 Kings 23:29). - NLTSB
Armaeddon . . This becomes a symbolic term to indicate a great battle. Not to be understand as a battle at this literal site, but used as a metaphor or an idom for a great warring contest.