The Army of Revolutionaries (Arabic: جيش الثوار, romanized: Jayš al-Thuwwār), or Jaysh al-Thuwar, is a multi-ethnic armed Syrian rebel coalition that is allied with the primarily Kurdish People's Protection Units (YPG) and participating in the Syrian Civil War as part of the Syrian Democratic Forces (SDF). Subsequently, Jaysh al-Thuwar retreated from rebel-held areas and further deepened its bonds with the YPG. In October 2015, it became one of the constituents of the Syrian Democratic Forces, increasingly integrating with the SDF's common frontlines against ISIL and other Islamist forces.