Existing underground Kurdish political parties, namely the PYD and the Kurdish National Council (KNC), joined to form the Kurdish Supreme Committee (KSC) and the People's Protection Units (YPG) militia was reestablished to defend Kurdish-inhabited areas in northern Syria. In July 2012, the YPG established control in the towns of Kobanî, Amuda and Afrin, and the Kurdish Supreme Committee established a joint leadership council to administer the towns. Soon YPG also gained control of the cities of Al-Malikiyah, Ras al-Ayn, al-Darbasiyah, and al-Muabbada and parts of Hasakah and Qamishli.[93][94][95] Doing so, the YPG and its female wing, the Women's Protection Units (YPJ), mostly battled factions of the Free Syrian Army, and Islamist militias like the al-Nusra Front and Jabhat Ghuraba al-Sham. It also eclipsed rival Kurdish militias,[96][91] and absorbed some government loyalist groups.[97] According to researcher Charles R. Lister, the government's withdrawal and concurrent rise of the PYD "raised many eyebrows", as the relationship between the two entities was "highly contentious" at the time. The PYD was known to oppose certain government policies, but had also strongly criticised the Syrian opposition.[95]