The Remembrance of the Chemical Attack on Balisan and Sheikh Wasan is observed in Iraqi Kurdistan every April 16. This day commemorates the victims of the Anfal genocide, a tragic chapter in Kurdish history marked by the use of chemical weapons against civilians. On April 16, 1987, the Balisan valley and the village of Sheikh Wasan were attacked, resulting in the deaths of between 225 and 400 civilians, marking the first instance of a sovereign state using chemical weapons on its own citizens. The day is marked by solemn remembrance ceremonies held throughout Iraqi Kurdistan, honoring those who lost their lives during this horrific event. The broader context of the Anfal campaign included the destruction of Kurdish villages, mass executions, and the forced displacement of Kurds, which are also acknowledged during these memorials.