Like so many times today, Alexander's sudden and precision arrow fire from his crossbows caused a great deal of casualties among his enemy, especially in the first few volleys.
The thick bolts with sharp steel heads pierced through the bronze armor and the light clothes the Margraves men wore underneath like they were paper, before strictly embedding themselves into the flesh- digging deep, deep into the hands, chest, thighs, belly, and for a very unlucky few, even the head and face.
The Margraves were luckily more armored than Lord Kite's leather clad guys.
But due to the close range and the complete surprise of the ambush, the lethality of the wound infected on the unit was perhaps similar if not arguably greater.