Camp Speicher massacre

On 12 June 2014, the Islamic State killed at least 1,566 Shia Iraqi Air Force cadets in an attack on Camp Speicher in Tikrit. At the time of the attack there were between 4,000 and 11,000 unarmed cadets in the camp. Alleged ISIS fighters singled out Shia and non-Muslim cadets from Sunni ones and executed them. The Iraqi government blamed the massacre on both ISIS and members from the Arab Socialist Ba'ath Party – Iraq Region. (Wikipedia)