|Saladin's Army as depicted in "The Kingdom of Heaven"|
It was the Turks with their highly mobile cavalry and mounted archers that most impressed the crusaders. Based on Christian descriptions, the crusaders found the infantry and even the heavy cavalry of their opponents unremarkable. The mounted archers on the other hand, with their tactics of pressing in close for a volley of arrows only to flee when challenged, frustrated and won grudging respect from the Franks. The Turkish tactic of pretending flight to lure Frankish cavalry into an ambush was well-recorded and highly effective--over and over again. The comparison to a pesky fly is colorful but somewhat deceptive since these "flies" could kill.
The diversity of tradition in Saracen armies had advantages and disadvantages. Good commanders could exploit the strengths of their various troops and use them to complement one another. Less effective commanders found their armies disintegrating or the units operating independently of one another. It was easy for the infantry to get left behind, forgotten and slaughtered. Cavalry without infantry support was vulnerable when they stopped to rest and water their horses, and utterly useless in siege warfare--which was the dominant form of engagement in the crusader period.
One element that was of mixed value were the jihadists. These men joined Saracen armies engaged in warfare against the crusader states for religious purification. While often untrained and poorly armed, they were fanatical and often keen for a martyr's death in battle against the "polytheists." In consequence, these troops could be used for particularly dangerous tasks such as storming a breech in a wall or scaling a siege ladder.
Furthermore, the fact that emirs came and went (squeezing as much revenue as possible from their subjects) undermined loyalty. Tenants farmers and peasants had little reason to identify with the ever changing cast of landlords sent to exploit them. This fact is reflected in the tendency of Saracen forces to dissolve comparatively rapidly. Saladin had consistent difficulty keeping his troops in the field for more than a month or so. Even after his great victory at Hattin and the plundering of an entire kingdom, his troops faded away when the rains started.
To compensate for the generally low levels of loyalty and morale among the conscripts, Saracen leaders depended increasingly upon mercenaries. These were predominantly drawn from the nomadic tribes of the Asian steppes, but included Armenians, further adding to the overall diversity of the Saracen force.