The Islamic West
The Maghreb and al-Andalus — the provinces that left the caliphate earliest and stayed gone, and the Berber empires that later ruled both shores of the strait.
The line below is a time axis. Position on it is date, so concurrency is visible: concurrent polities sit side by side rather than in sequence.
10 sourced edges run between this region and another, to Abbasid Caliphate, Fatimid Caliphate, Ottoman Empire, Kingdom of Sicily, Umayyad Caliphate of Cordoba and Songhai Empire. Those are not drawn on this line — a thread that crossed regions would assert a sequence nobody cited — but they are on each polity’s own page.