They usually gave themselves names with connections to Islam , such as the Firqat Salahadin or Firqat Khalid bin Walid .
Eighteen Firqat units , numbering between 50 and 150 men each , were eventually formed .
men usually gave themselves names with connections to Islam , such as the Firqat Salahadin or Firqat Khalid bin Walid .
Eighteen Firqat units , numbering between 50 and 150 men each , were eventually formed .