The response of Saudi Arabia to the Islamic State has taken many forms. For example, Saudi government agencies have worked with the United States since late 2014 to train and equip Syrian fighters hoping to engage with Islamic State of Iraq and the Levant (ISIL) militants. The challenges of dealing with ISIL is complicated by the fact that around 2,500 militants originally from Saudi territory have left for Syria in order to join ISIL, the destabilization created by the Syrian Civil War having a big effect on the region.