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|197 by topic|
|Ab urbe condita||950|
|Balinese saka calendar||118–119|
|Chinese calendar||丙子年 (Fire Rat)|
2893 or 2833
— to —
丁丑年 (Fire Ox)
2894 or 2834
|Coptic calendar||−87 – −86|
|- Vikram Samvat||253–254|
|- Shaka Samvat||118–119|
|- Kali Yuga||3297–3298|
|Iranian calendar||425 BP – 424 BP|
|Islamic calendar||438 BH – 437 BH|
|Minguo calendar||1715 before ROC|
|Seleucid era||508/509 AG|
|Thai solar calendar||739–740|
323 or −58 or −830
— to —
324 or −57 or −829
Year 197 (CXCVII) was a common year starting on Saturday (link will display the full calendar) of the Julian calendar. At the time, it was known as the Year of the Consulship of Magius and Rufinus (or, less frequently, year 950 Ab urbe condita). The denomination 197 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.
- February 19 – Battle of Lugdunum: Emperor Septimius Severus defeats the self-proclaimed emperor Clodius Albinus at Lugdunum (modern Lyon). Albinus commits suicide; legionaries sack the town.
- Septimius Severus returns to Rome and has about 30 of Albinus's supporters in the Senate executed. After his victory he declares himself the adopted son of the late Marcus Aurelius.
- Septimius Severus forms new naval units, manning all the triremes in Italy with heavily armed troops for war in the East. His soldiers embark on an artificial canal between the Tigris and Euphrates.
- Legio I, II, and III Parthica are levied by Septimius Severus for his Parthian campaign.
- The Roman army marches east to repel a Parthian invasion of Mesopotamia; they loot the royal palace at Ctesiphon and capture an enormous number of its inhabitants as slaves.
- Septimius Severus reconstitutes the Province of Mesopotamia under an equestrian governor commanding two legions.
- Septimius Severus, who had spared the Senate at the beginning of his reign, now excludes it from controlling the Roman empire by declaring a military dictatorship.
- Battle of Wancheng: Zhang Xiu launches a surprise attack at Cao Cao.
- Yuan Shu declares himself emperor of the short-lived Zhong dynasty.
Arts and sciences
- Galen's major work on medicines, Pharmacologia, is published.
- Deng Ai, Chinese general of the Cao Wei state in the Three Kingdoms period (d. 264)
- Empress Cao, last empress of the Chinese Han dynasty (d. 260)
- February 19 – Clodius Albinus, rival for Roman Emperor (b. 150)
- Cao Ang, eldest son of the Han dynasty warlord Cao Cao (b. 177)
- Dian Wei, Chinese military officer serving under the Han dynasty warlord Cao Cao
- Guo Si, Chinese general and regent of the Han dynasty
- Li Jue a military general serving under the autocratic warlord Dong Zhuo