418 BC

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Calendar year

Millennium:	1st millennium BC
Centuries:	6th century BC 5th century BC 4th century BC
Decades:	430s BC 420s BC 410s BC 400s BC 390s BC
Years:	421 BC 420 BC 419 BC 418 BC 417 BC 416 BC 415 BC
v t e

Politics
418 BC by topic
State leaders Political entities
Categories
Deaths
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418 BC in various calendars

Gregorian calendar 418 BC
CDXVIII BC

Ab urbe condita 336

Ancient Egypt era XXVII dynasty, 108

- Pharaoh Darius II of Persia, 6

Ancient Greek era 90th Olympiad, year 3

Assyrian calendar 4333

Balinese saka calendar N/A

Bengali calendar −1011 – −1010

Berber calendar 533

Buddhist calendar 127

Burmese calendar −1055

Byzantine calendar 5091–5092

Chinese calendar 壬戌年 (Water Dog)
2280 or 2073
— to —
癸亥年 (Water Pig)
2281 or 2074

Coptic calendar −701 – −700

Discordian calendar 749

Ethiopian calendar −425 – −424

Hebrew calendar 3343–3344

Hindu calendars

- Vikram Samvat −361 – −360

- Shaka Samvat N/A

- Kali Yuga 2683–2684

Holocene calendar 9583

Iranian calendar 1039 BP – 1038 BP

Islamic calendar 1071 BH – 1070 BH

Javanese calendar N/A

Julian calendar N/A

Korean calendar 1916

Minguo calendar 2329 before ROC
民前2329年

Nanakshahi calendar −1885

Thai solar calendar 125–126

Tibetan calendar 阳水狗年
(male Water-Dog)
−291 or −672 or −1444
— to —
阴水猪年
(female Water-Pig)
−290 or −671 or −1443

Year 418 BC was a year of the pre-Julian Roman calendar. At the time, it was known as the Year of the Tribunate of Fidenas, Axilla and Mugillanus (or, less frequently, year 336 Ab urbe condita ). The denomination 418 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

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By place

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Greece

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King Agis II of Sparta escapes being fined 10,000 drachmae and having his house razed for his failure to press his advantage by promising more successful outcomes in the future.
The Battle of Mantinea is the largest land battle of the Peloponnesian War (with as many as 10,000 troops on each side). Sparta under King Agis II has a major victory over Argos (and its allies Athens, Ellis and Mantinea), which has broken its treaty with Sparta's King Agis II at the insistence of Alcibiades. Agis II's major victory makes amends with the Spartans for his earlier truce with Argos. The commander of the Athenian forces, Laches, is killed in the battle.
Impressed with the Spartan victory, the inhabitants of Argos change their government from democracy to oligarchy and end their support for Athens in favour of an alliance with Sparta. Many of Argos' allies do the same. Athens becomes increasingly isolated.
Alcibiades urges the Athenians to conquer Syracuse, subdue Sicily and Carthage and thus gain added forces that will enable them to finish the war against Sparta. His bold offensive plan wins the support of the Athenians.