Year 368 BC was a year of the pre-Julian Roman calendar

Roman calendar

The Roman calendar changed its form several times in the time between the founding of Rome and the fall of the Roman Empire. This article generally discusses the early Roman or pre-Julian calendars...

. At the time, it was known as the Year of the Tribunate of Cornelius, Praetextatus, Structus, Capitolinus, Crassus and Cicurinus (or, less frequently, year 386 Ab urbe condita

Ab urbe condita

Ab urbe condita is Latin for "from the founding of the City ", traditionally set in 753 BC. AUC is a year-numbering system used by some ancient Roman historians to identify particular Roman years...

). The denomination 368 BC for this year has been used since the early medieval period, when the Anno Domini

Anno Domini

and Before Christ are designations used to label or number years used with the Julian and Gregorian calendars....

 calendar era

Calendar era

A calendar era is the year numbering system used by a calendar. For example, the Gregorian calendar numbers its years in the Western Christian era . The instant, date, or year from which time is marked is called the epoch of the era...

 became the prevalent method in Europe for naming years.

Greece

• While the previous year's intervention by the Macedon
  Macedon
  Macedonia or Macedon was an ancient kingdom, centered in the northeastern part of the Greek peninsula, bordered by Epirus to the west, Paeonia to the north, the region of Thrace to the east and Thessaly to the south....
  
  ians in Thessaly
  Thessaly
  Thessaly is a traditional geographical region and an administrative region of Greece, comprising most of the ancient region of the same name. Before the Greek Dark Ages, Thessaly was known as Aeolia, and appears thus in Homer's Odyssey....
  
   is successful, after the Macedonian troops withdraw, Alexander of Pherae
  Alexander of Pherae
  Alexander was tagus or despot of Pherae in Thessaly, and ruled from 369 BC to 358 BC.-Reign:The accounts of how he came to power vary somewhat in minor points. Diodorus Siculus tells us that upon the assassination of the tyrant Jason of Pherae, in 370 BC, his brother Polydorus ruled for a year,...
  
   treats his subjects as cruelly as before. So the Thessalians seek Thebes
  Thebes, Greece
  Thebes is a city in Greece, situated to the north of the Cithaeron range, which divides Boeotia from Attica, and on the southern edge of the Boeotian plain. It played an important role in Greek myth, as the site of the stories of Cadmus, Oedipus, Dionysus and others...
  
  ' support. Pelopidas
  Pelopidas
  Pelopidas was an important Theban statesman and general in Greece.-Athlete and warrior:He was a member of a distinguished family, and possessed great wealth which he expended on his friends, while content to lead the life of an athlete...
  
   is sent to their assistance, but is treacherously seized and imprisoned.
• In response, Epaminondas
  Epaminondas
  Epaminondas , or Epameinondas, was a Theban general and statesman of the 4th century BC who transformed the Ancient Greek city-state of Thebes, leading it out of Spartan subjugation into a preeminent position in Greek politics...
  
   is reinstated in command of Theban troops and leads the Theban army into Thessaly, where he out-manoeuvres the Thessalians and secures the release of Pelopidas without a fight.
• At the instigation of Alexander's brother-in-law, Ptolemy of Aloros, Alexander II of Macedon
  Alexander II of Macedon
  Alexander II was king of Macedon from 371 – 369 BC, following the death of his father Amyntas VI. He was the eldest of the three sons of Amyntas and Eurydice....
  
   is assassinated during a festival. Although Alexander's brother, Perdiccas III becomes the next king, he is under age, and Ptolemy is appointed regent
  Regent
  A regent, from the Latin regens "one who reigns", is a person selected to act as head of state because the ruler is a minor, not present, or debilitated. Currently there are only two ruling Regencies in the world, sovereign Liechtenstein and the Malaysian constitutive state of Terengganu...
  
  .

Philosophy

• Plato
  Plato
  Plato , was a Classical Greek philosopher, mathematician, student of Socrates, writer of philosophical dialogues, and founder of the Academy in Athens, the first institution of higher learning in the Western world. Along with his mentor, Socrates, and his student, Aristotle, Plato helped to lay the...
  
  's Republic
  Republic (Plato)
  The Republic is a Socratic dialogue written by Plato around 380 BC concerning the definition of justice and the order and character of the just city-state and the just man...
  
  is completed. It lays down the rules for an ideal, righteous society and suggests that kings ought to be philosophers (or at least taught by philosophers).