
However historians have not mentioned Liduma but I think it is obivous that after Susa, Alexander himslef conquered this city and then he decided to divide the Macedonian army, Please read this great article: ALEXANDER’S MARCH FROM SUSA TO PERSEPOLIS
As you read there, "The obvious place, in fact, for the division of the army is the plain of Fahlian, where the traveller has to decide whether to climb the high range of mountains confronting him or go round it;"
There are good reasons in this article which prove Parmenion stayed at Liduma for more days and why Alexander chose a dangerous road through the Zagros mountains to reach Persepolis, "It would have been no advantage to Alexander to bring a much larger force up to the Persian Gates, but if he did happen to require reinforcements they could have been sent up to him, since Parmenion would still have been in the Fahlian area at the time of the attack on the Gates. On the other hand, if he were repulsed at the Gates he could fall back on Parmenion's intact forces."
Marble staircase of Achaemenid palace of Lidma (the fourth largest Achaemenid palace after the palaces of Persepolis, Susa and Pasargadae)
Pics of New-Discovered Achaemenid city of Liduma: http://www.chnphoto.ir/gallery.php?gall ... 68&lang=en