378 BC

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Millennium: 1st millennium BC
378 BC in various calendars
Gregorian calendar 378 BC
Ab urbe condita 376
Ancient Egypt era XXX dynasty, 3
- Pharaoh Nectanebo I, 3
Ancient Greek era 100th Olympiad, year 3
Assyrian calendar 4373
Balinese saka calendar N/A
Bengali calendar −970
Berber calendar 573
Buddhist calendar 167
Burmese calendar −1015
Byzantine calendar 5131–5132
Chinese calendar 壬寅(Water Tiger)
2319 or 2259
    — to —
癸卯年 (Water Rabbit)
2320 or 2260
Coptic calendar −661 – −660
Discordian calendar 789
Ethiopian calendar −385 – −384
Hebrew calendar 3383–3384
Hindu calendars
 - Vikram Samvat −321 – −320
 - Shaka Samvat N/A
 - Kali Yuga 2723–2724
Holocene calendar 9623
Iranian calendar 999 BP – 998 BP
Islamic calendar 1030 BH – 1029 BH
Javanese calendar N/A
Julian calendar N/A
Korean calendar 1956
Minguo calendar 2289 before ROC
Nanakshahi calendar −1845
Thai solar calendar 165–166
Tibetan calendar 阳水虎年
(male Water-Tiger)
−251 or −632 or −1404
    — to —
(female Water-Rabbit)
−250 or −631 or −1403
A preserved section of the Servian Wall

Year 378 BC was a year of the pre-Julian Roman calendar. At the time, it was known as the Year of the Tribunate of Medullinus, Fidenas, Lanatus, Siculus, Pulvillus and Macerinus (or, less frequently, year 376 Ab urbe condita). The denomination 378 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.


By place[edit]


  • The Theban general and statesman, Epaminondas, takes command of Thebes. Pelopidas is elected boeotarch, or chief magistrate, of the city.
  • Timotheus, the son of the Athenian general Conon, is elected strategos of Athens.
  • A Spartan attempt to seize Piraeus brings Athens closer to Thebes. The Athenian mercenary commander Chabrias successfully faced off the larger army of Agesilaus II near Thebes. At the advance of Agesilaus' forces, instead of giving the order to charge, Chabrias famously ordered his men at ease—with the spear remaining pointing upwards instead of towards the enemy, and the shield leaning against the left knee instead of being hoisted against the shoulder. The command was followed immediately and without question by the mercenaries under his command, to be copied by their counterparts beside them, the elite Sacred Band of Thebes under the command of Gorgidas. This "show of contempt" stopped the advancing Spartan forces, and shortly afterwards Agesilaus withdrew.[1]
  • Athens allies itself with Thebes and forms the Second Athenian Empire. The confederacy includes most of the Boeotian cities and some of the Ionian islands.


  • Dionysius I's third war with Carthage proves disastrous. He suffers a crushing defeat at Cronium and is forced to pay an indemnity of 1,000 talents and cede the territory west of the Halycus River to the Carthaginians.

Roman Republic[edit]




  1. ^ Mark H. Munn (1993). The Defense of Attica: The Dema Wall and the Boiotian War of 378-375 B.C. University of California Press. ISBN 978-0520076853. 
  2. ^ An Illustrated Encyclopedia: "The Uniforms of the Roman World", Kevin F. Kiley (2012). Roman Republic Timeline 753–132 BC, p. 14. ISBN 978-0-7548-2387-2