Year 934 (CMXXXIV) was a common year starting on Wednesday (link will display the full calendar) of the Julian calendar.
The Ziyarid army occupies Ahvaz.
The Goryeo army defeats Hubaekje forces, in present-day Hongseong County.
March 16 – Meng Zhixiang declares himself emperor, and establishes Later Shu as a new state, independent of Later Tang.
The German king Henry I, the Fowler, and his Christian forces, defeat a heathen army under King Gnupa, and conquer Hedeby.
A Hungarian army, allied with the Pechenegs, defeats the Byzantine army (allied probably with the Bulgarians) at an unknown place (maybe today's Belgrade). After the battle, the Hungarians pillage the outskirts of Constantinople, forcing the emperor to pay them tribute.
The Eldgjá volcanic eruption is the largest basalt flood in history.
Einsiedeln Abbey is founded.
Dong Yuan, Chinese painter
Meng Zhixiang, Chinese general
Queen Emma of France (b. 894)
St Gervadius, Irish saint, hermit, in Lossiemouth
Ubayd Allah, political and religious leader, founder of the Fatimid Caliphate
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