Memories of Places in the Arab World.

I have often wondered, if certain places in the Arab world, do not have their own independent memories. Take for instance Islamic history. The Ummayad Dynasty in Damascus, set out to subdue Iraq [modern day] as well as Egypt [modern day]. The the Abbassid Dynasty, set out to subdue Damascus as well as [modern day Egypt]. The Fatimid Dynasty in Cairo, set out to subdue the other two. All belong in terms of geneology, to the family of Prophet Muhammad. Then, the Hamadani Dynasty in norther Syria and Mosul, the Boid Dynasty (Buwayhis) in Baghdad, and the Ikhshidis in Cairo, were at constant warfare with each other. All were Shiite dynasties. In modern times, Baa'th in Damascus, Baa'th in Baghdad, and Arab Nationalists in Egypt were openly hostile to each to other. The three stood for greater Arab unity. Now, Damascus, Baghdad and Cairo are at serious logger-heads with each other. I can'r find anything in common between the three regimes, except, they are based in countries with independent memories of their own.