Alexander of Pherae
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, but he was then poisoned by Alexander, another brother. However, according to Xenophon, Polydorus was murdered by his brother Polyphron, who was, in turn, murdered by his nephew Alexander —son of Jason, in 369 BC. Plutarch relates that Alexander worshiped the spear he slew his uncle with as if it were a god. Alexander governed tyrannically, and according to Diodorus, differently from the former rulers, but Polyphron, at least, seems to have set him the example. The states of Thessaly, which had previously acknowledged the authority of Jason of Pherae, were not so willing to submit to Alexander the tyrant, (especially the old family of the Aleuadae of Larissa, who had most reason to fear him). Therefore they applied for help from Alexander II of Macedon.
Alexander of Pherae, prepared to meet his enemy in Macedonia, but the king anticipated him, and, reaching Larissa, was admitted into the city. Alexander withdrew to Pherae whilst the Macedonian King placed a garrison in Larissa, as well as in Crannon, which had also come over to him. But once the bulk of the Macedonian army had retired, the states of Thessaly feared the return and vengeance of Alexander, and so sent for aid to Thebes, whose policy it was to put a check on any neighbor who might otherwise become too formidable. Thebes accordingly dispatched Pelopidas to the aid of Thessaly. On arrival of Pelopidas at Larissa, whence according to Diodorus, he dislodged the Macedonian garrison, Alexander presented himself and offered submission. When Pelopidas expressed indignation at the tales of Alexander's profligacy and cruelty, Alexander took alarm and fled.
These events appear to refer to the early part of the year 368 BC. In the summer of that year Pelopidas was again sent into Thessaly, in consequence of fresh complaints against Alexander. Accompanied by Ismenias, he went merely as a negotiator, without any military force, and was seized by Alexander and thrown into prison. The scholar William Mitford suggested that Pelopidas was taken prisoner in battle, but the language of Demosthenes hardly supports such an inference. The Thebans sent a large army into Thessaly to rescue Pelopidas, but they could not keep the field against the superior cavalry of Alexander, who, aided by auxiliaries from Athens, pursued them with great slaughter. The destruction of the whole Theban army is said to only have been averted by the ability of Epaminondas, who was serving in the campaign, but not as general.
In 367 BC, Alexander carried out a massacre of the citizens of Skotousa;. A fresh Theban expedition into Thessaly, under Epaminondas resulted, according to Plutarch, in a three-year truce and the release of prisoners, including Pelopidas. During the next three years, Alexander seemed to renew his attempts to subdue the states of Thessaly, especially Magnesia and Phthiotis, for upon the expiry of the truce, in 364 BC, they again applied to Thebes for protection from him. The Theban army under Pelopidas is said to have been dismayed by an eclipse (on July 13, 364, see 4th century BC eclipses), and Pelopidas, leaving the bulk of his army behind, entered Thessaly at the head of three hundred volunteer horsemen and some mercenaries. At Cynoscephalae, the Thebans defeated Alexander, but Pelopidas was killed ;. This was closely followed by another Theban victory under Malcites and Diogiton. Alexander was then forced to restore the conquered towns to the Thessalians, confine himself to Pherae, join the Boeotian League, and become a dependent ally of Thebes.
If the death of Epaminondas in 362 BC freed Athens from fear of Thebes, it appears at the same time to have exposed it to further aggression from Alexander of Pherae, who made a piratical raid on Tinos and other cities of the Cyclades, plundering them, and making slaves of the inhabitants. He also besieged Peparethus, and "even landed troops in Attica itself, and seized the port of Panormus, a little eastward of Sounion." The Athenian admiral Leosthenes defeated Alexander and managed to relieve Peparethus, but Alexander escaped from being blockaded in Panormus, took several Attic triremes, and plundered the Piraeus.
The murder of Alexander is assigned by Diodorus to 357/356 BC. Plutarch gives a detailed account of it, with a lively picture of the palace. Guards watched throughout the night, except at Alexander's bedchamber, which was at the top of a ladder with a ferocious chained dog guarding the door. Thebe, Alexander's wife and cousin (or half-sister, as the daughter of Jason of Pherae), concealed her three brothers in the house during the day, had the dog removed when Alexander had gone to rest, and, having covered the steps of the ladder with wool, brought up the young men to her husband's chamber. Though she had taken away Alexander's sword, they feared to set about the deed until she threatened to wake him. Her brothers then entered and killed Alexander. His body was cast into the streets, and exposed to every indignity.
Of Thebe's motive for the murder different accounts are given. Plutarch states it to have been fear of her husband, together with hatred of his cruel and brutal character, and ascribes these feelings principally to the representations of Pelopidas, when she visited him in his prison. In Cicero the deed is ascribed to jealousy. Other accounts have it that Alexander had taken Thebe's youngest brother as his eromenos and tied him up. Exasperated by his wife's pleas to release the youth, he murdered the boy, which drove her to revenge. 
- Elder, Edward (1867). "Alexander of Pherae". In William Smith. Dictionary of Greek and Roman Biography and Mythology 1. Boston: Little, Brown and Company. pp. 124–125.
- Diodorus Siculus, xv. 60-61
- Xenophon, Hellenica vi. 4. ~ 34
- This date is at variance with Pausanias (vi. 5)
- Wesseling, On Diodorus Siculus xv. 75
- Plutarch, Pelop. p. 293, &c.
- Diodorus Siculus, xv. 67
- Plutarch, Pelop. p. 291-297, d.
- Diodorus Siculus, xv. 71-75
- Polybius, viii. 1
- Demosthenes, Against Aristocrates p. 660
- William Mitford, History of Greece ch. 27. sec. 5
- Pausanias, Description of Greece vi. 5
- Diodorus Siculus, xv. 80
- Diodorus Siculus, xv. 95
- Polyaenus, vi. 2
- Demosthenes, c. Polycl. pp. 1207-1208
- Connop Thirlwall, History of Greece vol. v. p. 209
- Diodorus Siculus, xvi. 14
- Xenophon, Hellenica vi. 4. ~ 37
- Cicero, De Officiis 7
- Cicero, De Inventione ii. 49
- Aristot. ap. Cicero de Div. i. 25; the dream of Eudemus
Other sources 
- This article incorporates text from a publication now in the public domain: Chisholm, Hugh, ed. (1911). Encyclopædia Britannica (11th ed.). Cambridge University Press.
- This article incorporates text from a publication now in the public domain: Smith, William, ed. (1867). "article name needed". Dictionary of Greek and Roman Biography and Mythology.