759 Explained

Year 759 (DCCLIX) was a common year starting on Monday (link will display the full calendar) of the Julian calendar. The denomination 759 for this year has been used since the early medieval period, when the Anno Domini calendar era became the prevalent method in Europe for naming years.

Events

Battle of the Rishki Pass: Emperor Constantine V invades Bulgaria again, but his forces are ambushed and defeated while crossing the Rishki Pass, near Stara Planina (modern Bulgaria). The Bulgarian ruler (khagan) Vinekh does not exploit his success, and begins peace negotiations.^[1]

Siege of Narbonne: The Franks under King Pepin III ("the Short") retake Narbonne from the Muslims, after a 7-year siege. He pushes them back across the Pyrenees, and the Muslims retreat to the Andalusian heartland after 40 years of occupation. The government of the city is assigned to the Visigothic count Miló.

July 24 - King Oswulf of Northumbria is murdered by members of his own household (his servants or bodyguards), at Market Weighton. The Deiran patrician, Æthelwald Moll, who probably conspired in the regicide, is crowned king of Norhumbria. He may have been a descendant of the late king Oswine of Deira.
Exceptional winter in England. Frost begins October 1, and ends February 26, 760.^[2]

Caliph al-Mansur of the Abbasid Caliphate launches the conquest of Tabaristan (on the southern coast of the Caspian Sea). Its ruler, Khurshid II, flees into the mountainous region of Daylam.

An Lushan Rebellion: Tang forces under Guo Ziyi lay siege to the city of Yanjing (Northern China) as they increase their efforts to end the rebellion. The fighting creates such a shortage of food within its walls that rats sell at enormous prices.
Otomo no Yakamochi, Japanese general, compiles the first Japanese poetry anthology, Man'yōshū. It contains some 500 poems by Japanese poets who include the emperor, noblemen and commoners.
December 24 - Tang dynasty poet Du Fu departs for Chengdu, where he is hosted by fellow poet Pei Di.