378 BC

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Millennium: 1st millennium BC
378 BC in various calendars
Gregorian calendar378 BC
Ab urbe condita376
Ancient Egypt eraXXX dynasty, 3
- PharaohNectanebo I, 3
Ancient Greek era100th Olympiad, year 3
Assyrian calendar4373
Balinese saka calendarN/A
Bengali calendar−970
Berber calendar573
Buddhist calendar167
Burmese calendar−1015
Byzantine calendar5131–5132
Chinese calendar壬寅年 (Water Tiger)
2319 or 2259
    — to —
癸卯年 (Water Rabbit)
2320 or 2260
Coptic calendar−661 – −660
Discordian calendar789
Ethiopian calendar−385 – −384
Hebrew calendar3383–3384
Hindu calendars
 - Vikram Samvat−321 – −320
 - Shaka SamvatN/A
 - Kali Yuga2723–2724
Holocene calendar9623
Iranian calendar999 BP – 998 BP
Islamic calendar1030 BH – 1029 BH
Javanese calendarN/A
Julian calendarN/A
Korean calendar1956
Minguo calendar2289 before ROC
Nanakshahi calendar−1845
Thai solar calendar165–166
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 faces off the larger army of Agesilaus II near Thebes. At the advance of Agesilaus' forces, instead of giving the order to charge, Chabrias famously orders 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 is 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" stops the advancing Spartan forces, and shortly afterwards Agesilaus withdraws.[1]
  • Athens allies itself with Thebes and forms the Second Athenian League. 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