Dissolution of the khanates
Who & why: each khanate ends on its own schedule. The Yuan dynasty in China is overthrown by the ethnic-Han Ming in 1368, its remnant court retreating to the steppe as the Northern Yuan. The Ilkhanate in Persia effectively collapses after 1335 with no agreed successor, fracturing into rival Persianate dynasties (eventually feeding into the Timurid and Safavid states). The Chagatai Khanate in Central Asia splits and re-splits from the 1340s onward, its western half absorbed into Timur's own empire by the 1370s. The Golden Horde in Russia and the Pontic-Caspian steppe fragments more slowly, splintering into the Khanates of Kazan, Astrakhan, Crimea, and Sibir through the 15th century as the Russian principalities it had once taxed — Moscow foremost among them — grow strong enough to stop paying tribute and eventually conquer the fragments in turn.
What it represents: no single flag marks this era; the plain gold field is a placeholder. The sources read (Wikipedia's tug article and Flags of the World's early Mongol flags page) do not cover the khanates' end dates or gold as the colour of imperial authority.
Wikipedia gives separate end dates: Ilkhanate 1256-1335 (remnant ended 1357); Yuan 1271-1368 (Dadu fell 14 September 1368, Northern Yuan to 1635); Chagatai Khanate whole 1227-1347 with a western part to 1403 and Moghulistan to 1462; Golden Horde ended 1502 (called the Great Horde by 1466, with the Kazan, Astrakhan and Crimean khanates as successors). Wikipedia (Tug) says tugs were later used in derived Turco-Mongol khanates.
- Tug (banner) — Wikipedia compiled
- Golden Horde — Wikipedia compiled
- Chagatai Khanate — Wikipedia compiled
- Ilkhanate — Wikipedia compiled
- Yuan dynasty — Wikipedia compiled
Not established: All dates are from Wikipedia (one publisher) and no source links the period to a gold field as the colour of imperial authority; the plain gold field remains a placeholder. Wikipedia pages were read only to the first 100,000 characters.