Arab and other allied countries have carried out about 10 per cent of the nearly 2,000 air raids against the Islamic State group in Iraq and Syria since August, U.S. defense officials said. U.S. warplanes have conducted 1,768 air strikes since August 8, while other coalition aircraft have carried about 195 air raids, defense officials told AFP Sunday. The numbers, which for the first time shed light on the participation of Arab coalition partners, reflect the dominant role of the U.S. military in the air campaign. But Pentagon officials have insisted the role for Arab and European partners is likely to grow over time. Other figures released by officials and by U.S. Central Command showed the mounting scale of the air campaign. U.S. and coalition aircraft have flown more than 4,800 sorties in the air war, including more than 1,600 refueling runs by tankers, 700 surveillance flights as well as bombing missions.