The Master of Martyrs Battalions, or Kata'ib Sayyid al-Shuhada' (KSS) (Arabic: كتائب سيد الشهداء, The Battalions of the Master of Martyrs) is an Iraqi Shia militia formed in 2013. Its stated mission is to protect "(Shia) shrines across the globe", preserve "Iraqi unity" and to "put an end to the sectarian conflict". The group has been described as an Iranian proxy, and is one of the original militias that formed the Popular Mobilization Forces in 2014. The group has close ties to the Badr Organization.