events
The Great Prussian Uprising among the old Prussians begins against the Teutonic Knights.
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Prussian uprisings
13th-century revolts by Old Prussians against the Teutonic Knights
The Prussian uprisings were two major and three smaller uprisings by the Old Prussians, one of the Baltic tribes, against the Teutonic Knights that took place in the 13th century during the Prussian Crusade. The crusading military order, supported by the Popes and Christian…Source: Wikipedia (CC BY-SA)
September 20
Day of the year
September 20 is the 263rd day of the year in the Gregorian calendar; 102 days remain until the end of the year.Source: Wikipedia (CC BY-SA)