The International Freedom Battalion, commonly abbreviated as IFB or EÖT, is a revolutionary socialist armed group consisting of leftist foreign fighters fighting for the People's Defense Units in the Syrian Civil War in support of the Rojava Revolution and against the Turkish Armed Forces, the Syrian National Army, and Islamic State. The formation of the IFB was announced in June 2015 in Ras al-Ayn. Inspiration for the group came from the International Brigades of the Spanish Civil War. The political ideologies of the fighters include anarchism, Marxism–Leninism, Hoxhaism, Maoism, and anarcho-communism.

The People's Defense Units (YPG), also called People's Protection Units, is a mainly Kurdish militant group in Syria and the primary component of the Syrian Democratic Forces (SDF). YPG provides updates about its activities through YPG Press Office Telegram channel and social media accounts.