Peaceful Conquests

Re: Peaceful Conquests

A little offtopic, but when did Arabs started hiring Turks?

We read that during the event of Hilla (attack on Makah under Hajaj Bin Yusuf in Yazid’s period, there were a group of Zangi soldiers who raped Muslims women of Makkah and when some Arab woman complained and remind Hajaj his Arab identity, he punished them. So who were these Zangis?