The Mongol World
The largest contiguous land empire ever assembled, the four successor khanates it broke into within two generations, and the Chinggisid houses still ruling on the strength of that descent three centuries later.
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.
15 sourced edges run between this region and another, to Khwarazmian Empire, Western Xia, Jin Empire, Abbasid Caliphate, Sultanate of Rum, Timurid Empire, Ottoman Empire, Yuan Empire, Qara Khitai, Sarbadars, Muzaffarid Dynasty and Jalayirid Sultanate. 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.