It was originally planned to be held in 2014 amidst controversy and dispute between the regional and federal governments. Calls for Kurdish independence had been going on for years, with an unofficial 2005 referendum resulting in 98.98% voting in favor of independence. These longstanding calls gained impetus following the Northern Iraq offensive by Islamic State in Iraq and the Levant during the Iraqi Civil War in which Baghdad-controlled forces abandoned some areas, which were then taken by the Peshmerga and controlled "de facto" by the Kurds.