Gog and Magog
In his Commentary on Ezekiel (38:2), Jerome identifies the nations located beyond the Caucasus mountains and near Lake Maeotis as Gog and Magog. Thus the Gates of Alexander legend was combined with the legend of Gog and Magog from the Book of Revelation. It has been suggested that the incorporation of the Gog and Magog legend into the "Alexander romance" was prompted by the invasion of the Huns across the Caucasus mountains in 395 AD into Armenia and Syria.