[2] Hundreds of Yazidis received training from People's Protection Units (YPG) instructors at the Serimli military base in Qamishli, Syria, before being sent back to the Mount Sinjar frontlines.

[12][13] Its commander Sheikh Khairy Khedr was killed in action during the October 2014 clashes in Sinjar.

KRG Peshmerga forces fled Mount Sinjar when the Islamic State first attacked, leaving many Yazidis resentful and distrustful.

[16] In October 2015, the YBŞ participated in the foundation of the Sinjar Alliance as an all-Yazidi joint commando umbrella structure.

[18] In 2017, KRG-aligned media outlets claimed that around 800 members had left the YBŞ, and that 400 of them had joined the Peshmerga.