The "mount" of Megiddo in northern Israel is not actually a mountain, but a tell (a mound or hill created by many generations of people living and rebuilding on the same spot) on which ancient forts were built to guard the Via Maris, an ancient trade route linking Egypt with the northern empires of Syria, Anatolia and Mesopotamia. Megiddo was the location of various ancient battles, including one in the 15th century BC and one in 609 BC. The nearby modern Megiddo is a kibbutz in the Kishon River area.
The word Armageddon appears only once in the Greek New Testament, in Revelation 16:16. The word is a Greek transliteration of the Hebrew har məgiddô (הר מגידו). Har means "a mountain or range of hills". This is a shortened form of harar meaning "to loom up; a mountain". Megiddo refers to a fortification made by King Ahab that dominated the Plain of Jezreel. Its name means "place of crowds".
Adam Clarke wrote in his Bible commentary (1817) on Revelation 16:16:

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