Cleombrotus I
King of Sparta
Reign380–371 BC
PredecessorAgesipolis I
SuccessorAgesipolis II
Died6 July 371 BC
Leuctra, Boeotia
IssueAgesipolis II and Cleomenes II

Cleombrotus I (Greek: Κλεόμβροτος Kleombrotos; died 6 July 371 BC) was a Spartan king of the Agiad line, reigning from 380 BC until 371 BC. Little is known of Cleombrotus' early life. Son of Pausanias, he became king of Sparta after the death of his brother Agesipolis I in 380 BC, and led the allied Spartan-Peloponnesian army against the Thebans under Epaminondas in the Battle of Leuctra.[1] His death and the utter defeat of his army led to the end of Spartan dominance in ancient Greece. Cleombrotus was succeeded by his son Agesipolis II.[2] His other son was Cleomenes II.

Many historians cite Cleombrotus as having pro-Theban tendencies, unlike his fellow king, Agesilaus II. He was blamed for the humiliating defeat at Leuctra by his contemporaries for being biased towards the enemy, though some modern historians do not believe that he was actually pro-Theban.[3] He was the first Spartan king to die in battle since Leonidas at the Battle of Thermopylae.


  1. ^ Thurston Peck, Harry (1898). Harper's Dictionary of Classical Literature and Antiquities. New York: Harper & Brothers.
  2. ^ Smith, William (1867). Dictionary of Greek and Roman Biography and Mythology. Boston: Little Brown and Company. p. 71.((cite book)): CS1 maint: date and year (link)
  3. ^ Xenophon, Hell.

Further reading

Preceded byAgesipolis I Agiad King of Sparta 380–371 BC Succeeded byAgesipolis II