European writings make the first known mention of a three-field system in use in medieval Europe. The crop rotation is the practice of growing a series of different types of crops in the same area in sequential seasons. Under this system, the land of an estate or village is divided into three large fields, and makes a given section of land productive 2 years out of 3, instead of every other year (approximate date).
Baghdad nears completion as 100,000 laborers create a circular city about 2 km in diameter, the "Round City". In the center is a palace built for Caliph al-Mansur. The capital is ringed by three lines of walls (approximate date).
Waiofar, duke of Aquitaine, and his family are captured and executed by the Franks in the forest of Périgord. Waiofar's kinsman Hunald II succeeds to his claims and continues to fight against Charlemagne.
King Charlemagne (Charles "the Great") begins a military campaign against Aquitaine and Gascony. He leads a Frankish army to the city of Bordeaux, where he sets up a fort at Fronsac. His younger brother Carloman I refuses to participate in the uprising, and returns to Burgundy. Hunald, duke of Aquitaine, is forced to flee to the court of Gascony. Lupus II, fearing Charlemagne, turns Hunald over in exchange for peace, and is put in a monastery. Aquitaine and Gascony are subdued into the Frankish Kingdom.
^Kirby, p. 151, states that Oswine's origins are unknown. Marsden, pp. 232–233, suggests he was a son of Eadberht. The description of Oswine as an ætheling comes from John of Worcester's chronicle.
^Forsyth, Katherine (2000). "Evidence of a lost Pictish source in the Historia Regum Anglorum". In Taylor, Simon. Kings, clerics and chronicles in Scotland, 500–1297: essays in honour of Marjorie Ogilvie Anderson on the occasion of her ninetieth birthday. Dublin: Four Courts Press. ISBN1-85182-516-9.
^Meynier, Gilbert (2010). L'Algérie cœur du Maghreb classique: De l'ouverture islamo-arabe au repli (658-1518). Paris: La Découverte. p. 25.
^Sansom, p. 90; excerpt, "... Nakamaro, better known by his later title as the prime minister Oshikatsu, was in high favour with the emperor Junnin but not with the ex-empress Kōken. In a civil disturbance that took place in 764–765, Oshikatsu was captured and killed, while the young emperor was deposed and exiled in 765 and presumably strangled. Kōken reascended the throne as the empress Shōtoku, and her priest Dōkyō was all powerful until she died withous issue in 770."
^Gilbert Meynier (2010). L'Algérie cœur du Maghreb classique. De l'ouverture islamo-arabe au repli (658-1518). Paris: La Découverte; p.27
^Joel Serrão and A. H. de Oliverira Marques (1993). "O Portugal Islâmico". In Joel Serrão and A. H. de Oliverira Marques. Hova Historia de Portugal. Portugal das Invasões Germânicas à Reconquista. Lisbon: Editorial Presença. p. 124.