The Mongol Empire and Its Khanates
The largest contiguous land empire ever assembled, conquered in a single lifetime and partitioned within two generations into four khanates that answered to no single centre again - Ilkhanate Iran, the Golden Horde on the Volga, Chagatai's Central Asia, and the Yuan dynasty in China, whose own line held on in Mongolia for three centuries after Beijing was lost.
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.
28 sourced edges run between this region and another, to Khwarazmian Empire, Western Xia, Jin Empire, Abbasid Caliphate, Sultanate of Rum, Timurid Empire, Shaybanid Khanate, Crimean Khanate, Khanate of Kazan, Khanate of Astrakhan, Kazakh Khanate, Yuan Empire, Nogai Horde, Khanate of Sibir, Qara Khitai, Sarbadars, Muzaffarid Dynasty, Jalayirid Sultanate, Kievan Rus', The Grand Principality of Moscow, Sakya Regime (Sakya-Mongol Government of Tibet), Nizari Isma'ili State, Cuman-Kipchak confederation and Volga Bulgaria. 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.