Battle of the Persian Gate on the Mountain
329 BCE.
Shown on the map at 30.708°, 51.599°.
The Battle of the Persian Gate took place as part of the Wars of Alexander the Great. In the winter of 330 BC, Ariobarzanes of Persis led a last stand with his outnumbered Persian army at the Persian Gate, near Persepolis, and held back the Macedonian army for approximately a month. However, through captured prisoners of war or a local shepherd, Alexander found a path around to flank the Persian troops from the rear, allowing him to capture half of Persia proper in another decisive victory against the Achaemenid Empire.
Text from the Wikipedia article Battle of the Persian Gate, licensed CC BY-SA 4.0.