980

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Events

Peace is concluded between Emperor Otto II (the Red) and King Lothair III (or Lothair IV) at Margut, ending the Franco-German war of 978–980. Lothair renounces his claim on Lower Lorraine, while Otto promises to recognize Lothair's son Louis V as the rightful heir of the West Frankish Kingdom.
June 11 – Vladimir I (the Great), grand prince of Kiev, consolidates the Kievan realm from modern Ukraine to the Baltic Sea. Vladimir is proclaimed ruler (knyaz) of all Kievan Rus'.
Fall – Otto II sets off on his first expedition to Italy. He leaves the government in the hands of Archchancellor Willigis. Otto is accompanied by his wife, Empress Theophanu.Reuter, Timothy (1999). The New Cambridge Medieval History, Volume III, p. 254. {{ISBN|978-0-521-36447-8}}.
Winter – Otto II celebrates Christmas with his family at Ravenna. He receives the Iron Crown of Lombardy as the King of Italy.
King Harald Bluetooth orders the construction of the Viking ring fortress of Trelleborg (modern Denmark).

Viking raids from Scandinavia threaten the southern English coast after a pause of 25 years. Hampshire and the Isle of Thanet are ravaged.

The Dari dialect (which will become the major language of Persia) is developed in the royal courts of the Samanid Empire in Central Asia.

The Kilwa Sultanate, centered at Kilwa (an island off modern Tanzania), is founded by Ali ibn al-Hassan Shirazi, Persian prince of Shiraz.James Hastings (2003). Encyclopedia of Religion and Ethics – Part 24, p. 847 (Kessinger Publishing).

Notker (or Notger), Frankish Benedictine monk and bishop, founds the Prince-Bishopric of Liège (modern Belgium) which will remain an independent state inside the Holy Roman Empire for more than 800 years.