عبد السلام عارف
When the first Ba'ath Party government was deposed in a coup led by Abdul Salam Arif, Mustafa developed a close relationship with Arif. Mulla Mustafa signed an agreement with Arif in his personal capacity, rather than as president of the KDP. This infuriated Ahmad and Jalal Talabani as the agreement omitted any mention of self-administration, let alone autonomy—the whole point for which the Kurds had been fighting a long-term guerrilla war. Arif threatened force against any Kurdish opponent of Mustafa, while Mustafa declared that any resistance to Baghdad would constitute a declaration of war against himself and the Barzanis.