Saveh's Host Jammed in the Narrow Plain

From E5.9, Saveh and Bahram Chubin Face Each Other. It illustrates E5.9.15–22:

E5.9.15
He ranked his army in that narrow place;The air grew indigo, earth hid its face.
E5.9.16
Full forty thousand horsemen held the right,With javelins and spears prepared for fight;
E5.9.17
The left held forty thousand, row on row,With bared blades burning to confront the foe;
E5.9.18
One hundred thousand held the center line,Where Saveh’s golden throne and banners shine.
E5.9.19
Before the front, the elephants stood tall,And blocked the field, a living fortress wall;
E5.9.20
While crowded in the rear, the surplus massStood choked and useless in the narrow pass.
E5.9.21
King Saveh grieved to see his army’s plight,Confined within a field so cramped and tight.
E5.9.22
It seemed that Fortune turned against his reign,And sought to seize his throne upon that plain.