171 BC

Millennium:	1st millennium BC
Centuries:	3rd century BC 2nd century BC 1st century BC
Decades:	190s BC 180s BC 170s BC 160s BC 150s BC
Years:	174 BC 173 BC 172 BC 171 BC 170 BC 169 BC 168 BC

171 BC in various calendars

Gregorian calendar	171 BC CLXXI BC
Ab urbe condita	583
Ancient Egypt era	XXXIII dynasty, 153
- Pharaoh	Ptolemy VI Philometor, 10
Ancient Greek era	152nd Olympiad, year 2
Assyrian calendar	4580
Balinese saka calendar	N/A
Bengali calendar	−763
Berber calendar	780
Buddhist calendar	374
Burmese calendar	−808
Byzantine calendar	5338–5339
Chinese calendar	己巳年 (Earth Snake) 2527 or 2320     — to — 庚午年 (Metal Horse) 2528 or 2321
Coptic calendar	−454 – −453
Discordian calendar	996
Ethiopian calendar	−178 – −177
Hebrew calendar	3590–3591
Hindu calendars
- Vikram Samvat	−114 – −113
- Shaka Samvat	N/A
- Kali Yuga	2930–2931
Holocene calendar	9830
Iranian calendar	792 BP – 791 BP
Islamic calendar	816 BH – 815 BH
Javanese calendar	N/A
Julian calendar	N/A
Korean calendar	2163
Minguo calendar	2082 before ROC 民前2082年
Nanakshahi calendar	−1638
Seleucid era	141/142 AG
Thai solar calendar	372–373
Tibetan calendar	阴土蛇年 (female Earth-Snake) −44 or −425 or −1197     — to — 阳金马年 (male Iron-Horse) −43 or −424 or −1196

Year 171 BC was a year of the pre-Julian Roman calendar. At the time it was known as the Year of the Consulship of Crassus and Longinus (or, less frequently, year 583 Ab urbe condita). The denomination 171 BC 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

By place

Greece

• Epirus joins Macedonia in the latter's fight against Rome. However, the leagues of southern Greece remain neutral.
• Thanks to the efforts of Eumenes II of Pergamum while in Rome, the Romans declare war on Macedonia and send troops to Thessaly, thus beginning the Third Macedonian War. In the resulting Battle of Callicinus the Macedonians, led by their king, Perseus, are victorious over a Roman force led by consul Publius Licinius Crassus.
• Boiotian League dissolved by the Romans.

Roman Republic

• The first Roman colony outside Italy is founded at Carteia in southern Hispania after Iberian-born descendants of Roman soldiers appear before the Roman Senate to request a town to live in and are given Carteia, which is named Colonia Libertinorum Carteia.
• Lucius Postumius Albinus is sent by Rome as an ambassador to King Masinissa of Numidia, and to the Carthaginians in order to raise troops for the war against Perseus of Macedonia.

Parthia

• Mithradates I succeeds his brother Phraates I as king of Parthia.

Deaths

• Phraates I, King of Parthia, who has ruled the country since 176 BC