“The documents in the Islamic State file hinted at signs of rebellion within the ranks of its foreign fighters. A Belgian militant had a medical note saying he had back pain and would not join the battle. A fighter from France claimed he wanted to leave Iraq to carry out a suicide attack at home. Several requested transfers to Syria. Others just simply refused to fight.”

Source: A file on Islamic State’s ‘problem’ foreign fighters shows some are refusing to fight  – The Washington Post