The oil refinery city of Baiji was taken from ISIS Oct. 21 by Iraqi security forces and their Shi'ite militia allies. Key to the fighting was the Popular Mobilization Units or Hashid al-Shaabi militia. (Long War Journal, Oct. 19) After driving ISIS forces from the city, the PMU reported the discovery of at least 19 mass graves containing "365 bodies of Daesh terrorists"—the Arabic acronym for Islamic State. It was not clear how long the bodies had been buried there or how they were identified as ISIS fighters. (AFP, Oct. 21)