Is the decoration he's wearing atop his backpack a stylized horse's head? Is it a rank identifier, e.g., letting others know he's an LT? Or an honor marking, maybe declaring he was first to breach enemy defenses at a certain siege?
Thank you. It is a stylized lion's head, but the mane looks a bit weird.
Every squad in the army has a hieroglyph displayed on their left kneepad. The hieroglyph symbolizes the squad in some way, either relating to their role in the army or their past deeds. This squad has a stylized lion's head, which stands for strength or power. And their sergeant has earned the right to carry a golden version of this symbol atop his backpack.