Who ruled
- First Göktürk Khaganate Mukan Khan 553–572
- Sasanian Persia Khosrow I 531–579
- Western Göktürk Khaganate Istemi 552–576
And beyond the steppe
- China Northern Qi Emperor Wenxuan 550–559 · Western Wei Emperor Gong 554–556
- Iran Sasanian Khosrow I 531–579
- Korea Goguryeo Yangwon 545–559
- Byzantium Justinian Justinian I 527–565
Eastern steppe
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Environment · Late Antique Little Ice Age: the cold phase the Altai tree rings define from 536 to about 660 (536–660)
Climate and the steppe empires · First Göktürk Khaganate · Avars
The coldest decade in the Altai is the 540s
Western steppe
China
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Mukan Khan and the Western Wei general Shi Ning take Hezhen and Shudun from the Tuyuhun
Göktürk–Wei Campaign against Tuyuhun (556) · Western Wei · Mukan Khan · Tuyuhun
The Zhou Shu's Tuyuhun chapter dates the campaign to 555, its Göktürk chapter to a third year read as 556
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tenth month · Yuwen Tai dies at Yunyang; his son takes his offices