For 10 points, name these people who were rebelled against by Osman, a Sunni dynasty of Turks.
A vain leader of this people died after drawing his bow to kill a charging dagger-wielder, only to feel his foot slip, making the arrow misfire. These non-Buyid people cut up existing estates to pay their soldiers using the iqta system. One of these people's appointees, Zengi, split off to form his own emirate. After these people won at Dandanaqan, they took the area around Khorasan from the Ghaznavids. Their treasury was raided in the wake of their loss at Dorylaeum. One offshoot of this dynastic group was the Sultanate of Rum. These people were united by Toghrul after branching off from the Oghuz. The Byzantine emperor Romanus Diogenes lost to their leader Alp Arslan at Manzikert in 1071. For 10 points, name these people who were rebelled against by Osman, a Sunni dynasty of Turks.
A vain leader of this people died after drawing his bow to kill a charging dagger-wielder, only to feel his foot slip, making the arrow misfire.
Seljuk Turks [or Seljuks; or Seljukids; prompt "Turks"]