Year 180 BC was a year of the pre-Julian Roman calendar. At the time it was known as the Year of the Consulship of Luscus and Piso/Flaccus (or, less frequently, year 574 Ab urbe condita). The denomination 180 BC for this year has been used since the early medieval period, when the Anno Dominicalendar era became the prevalent method in Europe for naming years.
Events
By place
Greece
After three years of intriguing against his younger brother Demetrius, including accusing him of coveting the succession to the Macedonian throne and being allied to Rome, Perseus persuades his father King Philip V of Macedon to have Demetrius executed.
Roman Republic
Rome completes its subjugation of all of Italy with the defeat of the Ligurians in a battle near modern Genoa. Rome deports 40,000 Ligurians to other areas of the Republic.
Apollodotus I, a general with Demetrius I of Bactria, becomes king of the western and southern parts of the Indo-Greek kingdom, from Taxila in Punjab to the areas of Sindh and possibly Gujarat. He maintains his allegiance to Demetrius I.
Fearing reprisals should the young Emperor Houshao and his brothers reach adulthood, the conspirators deny that Emperor Hui was the father of Houshao and his brothers. They overthrow the emperor, and despite the imperial pedigree of Liu Xiang as the son of the eldest son of Gaozu of Han, they eventually agree to elevate Gaozu's oldest surviving son, Emperor Wen, to the throne. After being evicted from the palace, Houshao is executed later in the year.
Emperor Wen honours the relatives and ancestors of Zhao Tuo, the Chinese-born ruler of Nanyue (in present-day Vietnam and southern China). As a result, Nanyue returns to the Han dynasty as a vassal, although Zhao Tuo continues to call himself an emperor within his own kingdom.
Aristophanes of Byzantium, Greek scholar, critic and grammarian, particularly renowned for his work in Homeric scholarship, but also for work on other classical authors such as Pindar and Hesiod. After early studies under leading scholars in Alexandria, he has been chief librarian since about 195 BC (b. 257 BC)
Liu Hong, fourth emperor of the Chinese Han dynasty (b. 190 BC)