Ghulam soldiers from the Ayyubid Dinasty.
Ghulams are, essentially, professional and really well-equiped slave warriors used by the Muslim dynasties for centuries. The concept of slavery for the mulims of the time was radically different than that common to the western countries, and being a Ghulam was a position of great respect and honor - mainly because the sultans did not trust their own troops.
They were, in general, slavs, turkish or indians, the strongest of them, and would join the army either when bought or through battle.
These are from the XII century, and probably cavalrymen.
And I may lack archeological backing here, but I believe they also mocked their officers. Just as any other group of young guys.