280

Roman Empire

• Emperor Probus
  Probus
  Marcus Aurelius Probus was a Roman Emperor .A native of Sirmium , in Pannonia, at an early age he entered the army, where he distinguished himself under the Emperors Valerian, Aurelian and Tacitus...
  
   suppresses the revolt of the usurper
  Roman usurper
  Usurpers are individuals or groups of individuals who obtain and maintain the power or rights of another by force and without legal authority. Usurpers were a common feature of the late Roman Empire, especially from the crisis of the third century onwards, when political instability became the...
  
   Proculus
  Proculus
  Proculus was a Roman usurper, one of the "minor pretenders" according to Historia Augusta; he took the purple against Emperor Probus in 280....
  
  .
• Probus chases the Alani off to Asia Minor.
• The commander of the Roman fleet on the Rhine
  Rhine
  The Rhine is one of the longest and most important rivers in Europe, at , with an average discharge of more than ....
  
  , Bonosus
  Bonosus (emperor)
  Bonosus was a Roman usurper. Born in Hispania, his father was from Britain and his mother from Gaul. He lost his father early in life but his mother gave him a decent education...
  
  , is proclaimed emperor. Beaten by Probus' troops, Bonosus is hung.
• In Alexandria, Julius Saturninus
  Julius Saturninus
  Sextus Julius Saturninus was a Roman usurper against Emperor Probus.Julius Saturninus was a Gaul by birth and was a friend of Emperor Probus...
  
  , who is in charge of the defense of the East, is declared emperor. He withdraws to Apamea
  Apamea (Syria)
  Apamea or Apameia was a treasure city and stud-depot of the Seleucid kings, was capital of Apamene, on the right bank of the Orontes River....
  
  , is besieged and put to death.
• Owing to the constant threat of invasion, the cities in Gaul
  Gaul
  Gaul is a historical name used in the context of the Roman Empire in references to the region of Western Europe approximating present day France and Belgium, but also sometimes including the Po Valley, western Switzerland, and the parts of the Netherlands and Germany on the west bank of the River...
  
   construct or reinforce their defensive walls.

Asia

• The Kingdom of Wu is dissolved by Jin
  Jìn Dynasty (265-420)
  The Jìn Dynasty , one of the Six Dynasties, following the Three Kingdoms period and followed by the Southern and Northern Dynasties in China. The dynasty was founded by the Sima family...
  
  , finally ending the Three Kingdoms
  Three Kingdoms
  The Three Kingdoms period is a period in the history of China, part of an era of disunity called the Six Dynasties following immediately the loss of de facto power of the Han Dynasty emperors. In a strict academic sense it refers to the period between the foundation of the Wei in 220 and the...
  
   period in the history of China.
• The Gupta Empire
  Gupta Empire
  The Gupta Empire was an Ancient Indian empire which existed approximately from 320 to 550 CE and covered much of the Indian Subcontinent. Founded by Maharaja Sri-Gupta, the dynasty began the Classical Age in the Middle kingdoms of India...
  
   is founded (approximate date).

Arts and sciences

• The Greek mathematician Pappus
  Pappus of Alexandria
  Pappus of Alexandria was one of the last great Greek mathematicians of antiquity, known for his Synagoge or Collection , and for Pappus's Theorem in projective geometry...
  
   demonstrates geometrically the property of the center of gravity
  Center of mass
  The center of mass of a system of particles is a specific point where, for many purposes, the system behaves as if its mass were concentrated there. The center of mass is a function only of the positions and masses of the particles that compose the system...
  
  .

Births

• Saint George
  Saint George
  Saint George was, according to tradition, a Roman soldier in the Guard of Diocletian, who is venerated as a Christian martyr. In hagiography Saint George is one of the most venerated saints in the Roman Catholic Church, Anglican Church, Eastern Orthodox Church, Oriental Orthodox Church, and the...
  
  , soldier
  Soldier
  A soldier is a member of the land component of national armed forces; whereas a soldier hired for service in a foreign army would be termed a mercenary...
  
   of the Roman Empire and later Christian
  Christianity
  Christianity is a monotheistic religion based on the life and teachings of Jesus of Nazareth as presented by the revelations in the New Testament....
  
   martyr
  Martyr
  A martyr is somebody who suffers persecution and death for refusing to renounce a belief, usually religious.-Meaning:...
  
   (or 275
  275
  -Roman Empire:* Roman Emperor Aurelian is murdered by troops while preparing to invade Persia.* September 25—Marcus Claudius Tacitus is appointed emperor by the Senate against his will.* Gaul is pillaged by the Franks and the Alemanni.-Births:...
  
  , approximate date)

Deaths

• Maharaja Sri-Gupta
  Maharaja Sri-Gupta
  Sri Gupta was a pre-imperial Gupta king in northern India and start of the Gupta dynasty. A portion of northern or central Bengal might have been the home of Guptas at that time, but however not much evidence is available....
  
   of the Gupta dynasty
• Proclus
  Proclus
  Proclus Lycaeus , called "The Successor" or "Diadochos" , was a Greek Neoplatonist philosopher, one of the last major Classical philosophers . He set forth one of the most elaborate and fully developed systems of Neoplatonism...
  
  , Roman usurper
  Roman usurper
  Usurpers are individuals or groups of individuals who obtain and maintain the power or rights of another by force and without legal authority. Usurpers were a common feature of the late Roman Empire, especially from the crisis of the third century onwards, when political instability became the...
  
  
• Cen Hun
  Cen Hun
  Cen Hun was a minister under the Kingdom of Wu during the later years of the Three Kingdoms Period of China. Cen Hun was a close friend of Wu's last Emperor, Sun Hao. Cen Hun is credited with inciting Sun Hao's tyranny...
  
  , minister under the Kingdom of Wu
• Kang Senghui
• Zhang Ti
  Zhang Ti
  Zhang Ti was a minister serving under the Kingdom of Wu during the later years of the Three Kingdoms Period of China. Zhang Ti was destined to be the last prime minister of Wu. Zhang Ti, along with many others, fought very hard against the Kingdom of Jin...