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The 170s decade ran from January 1, 170, to December 31, 179.
- The Suebian tribes of the Marcomanni cross the Danube and invade northern Italy. The Roman army (20,000 men) is destroyed near Carnuntum in Pannonia.
- The Marcomanni plunder Opitergium (modern Oderzo) and besiege Aquileia. This is the first time hostile forces have entered Italy since 101 BC.
- Emperor Marcus Aurelius writes in Sirmium (Pannonia) his first of 12 books of the Meditations in Koine Greek.
- The Costoboci cross the Danube (Dacia) and ravage Thrace in the Balkan Peninsula. They reach Eleusina, near Athens, and destroy the temple of the Eleusinian Mysteries.
- Marcus Aurelius orders humane treatment for Christians and slaves throughout the Roman Empire.
- An Equestrian Statue of Marcus Aurelius is erected in Rome.
- The Porta Nigra is built in Augusta Treverorum (modern Trier).
Arts and sciencesEdit
- Emperor Marcus Aurelius forms a new military command, the praetentura Italiae et Alpium. Aquileia is relieved, and the Marcomanni are evicted from Roman territory.
- Marcus Aurelius signs a peace treaty with the Quadi and the Sarmatian Iazyges. The Germanic tribes of the Hasdingi (Vandals) and the Lacringi become Roman allies.
- Armenia and Mesopotamia become protectorates of the Roman Empire.
- The Costoboci cross the Danube (Dacia) and ravage Thrace in the Balkan Peninsula. They reach Eleusis, near Athens, and destroy the temple of the Eleusinian Mysteries.
- In May or June, the orator Aelius Aristides delivers a public speech in Smyrna, lamenting the damage recently inflicted to the sacred site of Eleusis.
- Emperor Marcus Aurelius crosses the Danube with an expeditionary force. He subdues the Marcomanni and their allies and then, in a pact signed with the Germanic tribes, he imports them into the Roman Empire to occupy areas that have been depopulated by the plague.
- The Sarmatians attack the lower Danube frontier.
- Miracle in Moravia: As the Roman army is encircled by the Quadi under intense heat, a violent thunderstorm sweeps away the Quadi in a torrent of water and mud, and refreshes the parched legionaries.
- Avidius Cassius, governor of Syria, suppresses an agrarian revolt in Egypt and is made supreme commander of the Roman army in the East.
- Last (5th) year of Jianning era and start of Xiping era of the Chinese Han Dynasty.
- Battle of Jwa-won: Goguryeo Prime Minister Myeongnim Dap-bu defeats the Chinese Han Dynasty forces in Manchuria.
- Tatian produces his Diatessaron, a harmony of the four gospels.
- Montanism spreads through the Roman Empire.
- Gnaeus Claudius Severus and Tiberius Claudius Pompeianus become Roman Consuls.
- Given control of the Eastern Empire, Avidius Cassius, the governor of Syria, crushes an insurrection of shepherds known as the Boukoloi.
- Empress Faustina the Younger accompanies her husband, Marcus Aurelius, on various military campaigns and enjoys the love of the Roman soldiers. Aurelius gives her the title of Mater Castrorum (Mother of the Camp).
- Marcus Aurelius officially confers the title Fulminata (Thundering) to the Legio XII Fulminata.
- Reign in India of Yajnashri Satakarni, Satavahana king of the Andhra. He extends his empire from the center to the north of India.
Arts and sciencesEdit
- Meditations by Marcus Aurelius is written, in Greek, while on military campaigns.
- Marcus Aurelius suppresses a revolt of Avidius Cassius, governor of Syria, after the latter proclaims himself emperor.
- Avidius Cassius fails in seeking support for his rebellion and is assassinated by Roman officers. They send his head to Aurelius, who persuades the Senate to pardon Cassius's family.
- Commodus, son of Marcus Aurelius and his wife Faustina, is named Caesar.
- M. Sattonius Iucundus, decurio in Colonia Ulpia Traiana, restores the Thermae of Coriovallum (modern Heerlen) there are sources that state this happened in the 3rd century.
- Confucian scholars try to ensure their capacity in the royal court of China. They are massacred by the eunuchs.
- November 27 – Marcus Aurelius grants Commodus the rank of Imperator and makes him Supreme Commander of the Roman legions.
- December 23 – Emperor Marcus Aurelius and his son Commodus enter Rome after a campaign north of the Alps and receive a triumph for their victories over the Germanic tribes.
- Equestrian Statue of Marcus Aurelius is made. It is now kept at Museo Capitolini in Rome (approximate date).
- Lucius Aurelius Commodus Caesar (age 15) and Marcus Peducaeus Plautius Quintillus become Roman Consuls.
- Commodus is given the title Augustus and is made co-emperor with the same status as his father Marcus Aurelius.
- Marcus Aurelius begins a systematic persecution of Christians at Rome, the followers take refuge in the catacombs.
- Churches in southern Gaul are destroyed after a crowd accuses the local Christians of practicing cannibalism and incest.
- Forty-seven Christians are martyred in Lyon (Saint Blandina and Pothinus, bishop of Lyon, are among them).
- Second Marcomannic War: Marcus Aurelius and Commodus begin war against the Quadi and the Marcomanni.
- Chinese troops suffer a crushing defeat against a confederacy of Central Asian tribes led by the Xianbei (see Wu Hu).
- Bruttia Crispina marries Commodus, and receives the title of Augusta.
- Emperor Marcus Aurelius and his son Commodus arrive at Carnuntum in Pannonia, and travel to the Danube to fight against the Marcomanni.
- Last (7th) year of Xiping era and start of Guanghe era of the Chinese Han Dynasty.
- In India, the decline of the Kushan Empire begins. The Sassanides take over Central Asia.
- The Roman fort Castra Regina ("fortress by the Regen river") is built at Regensburg, on the right bank of the Danube in Germany.
- Roman legionaries of Legio II Adiutrix engrave on the rock of the Trenčín Castle (Slovakia) the name of the town Laugaritio, marking the northernmost point of Roman presence in that part of Europe.
- Marcus Aurelius drives the Marcomanni over the Danube and reinforces the border. To repopulate and rebuild a devastated Pannonia, Rome allows the first German colonists to enter territory controlled by the Roman Empire.
- Abgar IX the Great becomes King of Edessa.
- Gogukcheon succeeds his father Shindae as King of Goguryeo.
- Han Dynasty China: The full title of the Nine Chapters on the Mathematical Art appears on two bronze standard measures dated to this year, yet there is speculation that the same book existed beforehand only under different titles. In the 3rd century, Liu Hui would provide commentary on this important early Chinese mathematical treatise.
- Guo Jia, adviser to the Han dynasty warlord Cao Cao (d. 207)
- Julia Domna, Roman Empress (d. 217)
- Philostratus II the Athenian, Greek sophist (approximate date) (d. c. 250)
- Sima Lang, Han dynasty official (d. 217)
- Tian Yu, general of the Cao Wei state in the Three Kingdoms period (d. 252)
- Jia Kui, general of the Cao Wei state in the Three Kingdoms period (d. 228)
- Tuoba Liwei, leader of the Tuoba clan (d. 277)
- Zhuge Jin, general of the Eastern Wu state in the Three Kingdoms period (d. 241)
- Pope Pontian, pope of the Catholic Church (d. 235)
- Sun Ce, Han dynasty warlord (d. 200)
- Yang Xiu, adviser to the Han dynasty warlord Cao Cao (d. 219)
- Zhou Yu, general serving under the Han dynasty warlord Sun Quan (d. 210)
- Fa Zheng, adviser to the Han dynasty warlord Liu Bei (d. 220)
- Liu Bian, Han dynasty emperor (d. 190)
- Ma Chao, general of the Shu Han state in the Three Kingdoms period (d. 222)
- Cao Ang, first son of the Han dynasty warlord Cao Cao (approximate date) (d.197)
- Sun Yu, Han dynasty general and cousin of the warlord Sun Quan (d. 215)
- Wang Can, Han dynasty official, scholar and poet (d. 217)
- Zhu Huan, general of the Eastern Wu state in the Three Kingdoms period (d. 238)
- An Shigao, Buddhist missionary
- Apuleius, Latin writer (b. 124)
- Marcus Cornelius Fronto, Roman grammarian, rhetorician and advocate (approximate date) (b. c. AD 100)
- Saint Donatus of Muenstereifel (ca. 140)
- July – Avidius Cassius, Roman Emperor (usurper) (b. c. 130)
- Concordius of Spoleto, Christian martyr
- Faustina the Younger, Roman empress (b. c. 130 AD)
- Stephen Dando-Collins (2010). Legions of Rome. St. Martin's Press. p. 165. ISBN 9781250004710.
- Heerlen.nl Archived September 26, 2007, at the Wayback Machine "De Thermen" (in Dutch)
- Heerlen.nl Archived September 26, 2007, at the Wayback Machine "Sattonius Icundus" (in Dutch)
- McLynn, Frank (2009). Marcus Aurelius: warrior, philosopher, emperor. Bodley Head. p. 400.
- Long, George; Flint, W. Russell (2005). The Thoughts of the Emperor Marcus Aurelius Antoninus. Kessinger Publishing. p. xvii. ISBN 978-1-4179-6410-9.
- Bowman, Alan K.; Garnsey, Peter; Rathbone, Dominic (2000). The Cambridge ancient history: The High Empire, A.D. 70–192 (2nd ed.). Cambridge University Press. p. 981. ISBN 978-0-521-26335-1.
- "List of Rulers of Korea". www.metmuseum.org. Retrieved 18 April 2019.
- Lühmann, Werner (2003). Konfuzius: aufgeklärter Philosoph oder reaktionärer Moralapostel? : der Bruch in der Konfuzius-Rezeption der deutschen Philosophie des ausgehenden 18. und beginnenden 19. Jahrhunderts. Harrassowitz. p. 68. ISBN 978-3-447-04753-1.