رشيد عالي الكيلاني
A significant conflict between Arsuzi's and Aflaq's movements occurred when they sparred over the issue of the 1941 "coup d'etat" by Rashid Ali al-Gaylani and the subsequent Anglo–Iraqi War. Aflaq's movement supported al-Gaylani's government and the Iraqi government's war against the British, and organized volunteers to go to Iraq and fight for the Iraqi government. However, Arsuzi opposed al-Gaylani's government, considering the coup to be poorly-planned and a failure. At this point, Arsuzi's party lost members and support that transferred to Aflaq's movement.