Despite the Peace of Nicias still being in effect, Sparta's King Agis II gathers a strong army at Philus and descends upon Argos by marching at night from the north. His allied Boeotian forces fail him, but he is able to conclude a treaty with Argos. In 419 BC, the Argives, at the instigation of Alcibiades, attacked Epidaurus; and Agis with a large force from Lacedaemon set out and marched to the frontier city of Leuctra. No one, Thucydides tells us, knew the purpose of this expedition. It was probably to make a diversion in favour of Epidaurus. [1]
King Agis II of Sparta escapes being fined 10,000 drachmae and having his house razed for his failure to press his advantage by promising more successful outcomes in the future.
The Battle of Mantinea is the largest land battle of the Peloponnesian War (with as many as 10,000 troops on each side). Sparta under King Agis II has a major victory over Argos (and its allies Athens, Ellis and Mantinea), which has broken its treaty with Sparta's King Agis II at the insistence of Alcibiades. Agis II's major victory makes amends with the Spartans for his earlier truce with Argos. The commander of the Athenian forces, Laches, is killed in the battle.
Impressed with the Spartan victory, the inhabitants of Argos change their government from democracy to oligarchy and end their support for Athens in favour of an alliance with Sparta. Many of Argos' allies do the same. Athens becomes increasingly isolated.
Alcibiades urges the Athenians to conquer Syracuse, subdue Sicily and Carthage and thus gain added forces that will enable them to finish the war against Sparta. His bold offensive plan wins the support of the Athenians.
Following the loss by Athens and its allies in the Battle of Mantinea, a political "tug of war" takes place in Athens. Alcibiades joins forces with Nicias against Hyperbolus, the successor of the demagogue politician Cleon as champion of the common people. Hyperbolus tries to bring about the ostracism of either Nicias or Alcibiades, but the two men combine their influence and induce the Athenian people to expel Hyperbolus instead.[2][3]
The second battle of Hysiae is fought between the armies of Sparta and Argos during the Peloponnesian War. The Spartan King Agis II was seeking to restore the pro-Spartan faction evicted from Argos by Alcibiades. While he failed to take the city of Argos, he did capture and subsequently destroy the town of Hysiae, killing all its male inhabitants.[4]
With the encouragement of Alcibiades, the Athenians take the island of Melos (which has remained neutral during the Peloponnesian War). Its inhabitants are treated with great cruelty by the Athenians, with all the men capable of bearing arms being killed, while the women and children are made slaves.
In Sicily, the Ionian city of Segesta asks for Athenian help from the Dorian city of Selinus (which is supported by the powerful Sicilian city of Syracuse). The people of Syracuse are ethnically Dorian (as are the Spartans), while the Athenians, and their allies in Sicily, are Ionian. The Athenians feel obliged to assist their ally and therefore prepare an armada to attack Sicily.
Athenianorator and politician, Andocides is imprisoned on suspicion of having taken part in the mutilation of the sacred busts called "Hermae" shortly before the departure of Athens' military expedition to Sicily. These mutilations cause a general panic, and Andocides is induced to turn informer. Andocides' testimony is accepted, and those whom he implicates, including Alcibiades, are condemned to death. Andocides is sent into exile.
The Athenian expedition to Sicily sets sail under Nicias, Lamachus and Alcibiades. After his departure with the armada, Alcibiades is accused of profanity and is recalled to Athens to stand trial.
After learning that he has been condemned to death in absentia, Alcibiades defects to Sparta and Nicias is placed in charge of the Sicilian expedition. The Athenian forces land at Dascon near Syracuse but with little result. Hermocrates heads the Syracusan defence.
Alcibiades openly joins with the Spartans and persuades them to send Gylippus to assist Syracuse and to fortify Decelea in Attica. He also encourages Ionia to revolt against Athens. As a result, a Spartan fleet soon arrives to reinforce their allies in Syracuse and a stalemate ensues.
Construction of the Temple of Hephaestus in Athens is completed. Construction had begun in 449 BC.
The Athenian army moves to capture Syracuse while the larger fleet of Athenian ships blocks the approach to the city from the sea. After some initial success, the Athenian troops become disorganised in the chaotic night operation and are thoroughly routed by Gylippus, the Spartan commander. The Athenian commander Lamachus is killed. Nicias, although ill, is left in sole charge of the siege of Syracuse.[5]
After suffering a defeat in which the Athenian commander Lamachus is killed, Demosthenes suggests that they immediately give up the siege of Syracuse and return to Athens, where they are needed to defend against a Spartan invasion of Attica. Nicias refuses, but the Syracusans and Spartans under Hermocrates are able to trap the Athenians in the harbour and the Athenians sustain heavy losses in the Battle of Syracuse. Demosthenes is ambushed by the Syracusans and is forced to surrender. Nicias is soon captured as well, and both are executed, with most of the surviving Athenian soldiers sent to work in the Sicilian quarries. Ten proboulos (including Sophocles) are elected to help run Athens.
Tissaphernes, the Persiansatrap of Lydia and Caria, forms an alliance with Sparta. The Spartans, with strategic advice from Alcibiades and limited assistance from the Persians under Pharnabazus, advance almost to the gates of Athens. King Agis II leads the Spartan force that occupies Decelea in Attica.
Archelaus I becomes King of Macedonia following the death of his father, King Perdiccas II. Archelaus seizes the throne after murdering his uncle, his cousin, and his half brother, the legitimate heir.
The Spartans sign a treaty of mutual help with the Persian satrap of Lower Asia, Tissaphernes. By the treaty of Miletus, Persia is given complete freedom in western Asia Minor in return for agreeing to pay for seamen to man the Peloponnesian fleet.
Alcibiades helps stir up revolts amongst Athens' allies in Ionia, on the west coast of Asia Minor. However, Alcibiades loses the confidence of the Spartans and antagonises their king Agis II. As a result, he flees to the court of the PersiansatrapTissaphernes.[6] Alcibiades advises Tissaphernes to withdraw his support from Sparta while conspiring with the oligarchic party in Athens, as Sparta's allied cities break away in a series of revolts.
The Athenians vote to use their last reserves to build a new fleet.
Clazomenae revolts against Athens.[7] After a brief resistance, however, it again acknowledges the Athenian supremacy.
An epidemic of an unknown disease hits Northern Greece.
June 9 – The democracy of Athens is overthrown by the oligarchic extremists, Antiphon, Theramenes, Peisander and Phrynichus in an effort by the oligarchists to exert more control over the conduct of the war with Sparta and its allies. A "Council of Four Hundred" is set up.[8] The total defeat of the Athenian expedition to Sicily and the consequent revolts of many of the subject-allies has weakened Athenian finances severely; the acknowledged purpose of the revolutionary movement is to revise the constitution to better run Athens' finances. However, its rule is high-handed and the Council of Four Hundred is only able to maintain itself for four months.
When a mutiny breaks out amongst the troops who are fortifying Piraeus (the harbour for Athens), the Council sends Theramenes to quell it. Instead, he puts himself at the head of the mutineers. After Phrynichus, the leader of the extremists, is assassinated, an ensuing meeting of the Athenian Assembly deposes the Council and restores the traditional constitution, but restricts some of the privileges of citizenship to a body called the Five Thousand. The Assembly resumes its old form in being a committee of all citizens.
The Athenian navy under Thrasybulus recalls Alcibiades from Sardis. Alcibiades' election is confirmed by the Athenians at the request of Theramenes. A Spartan fleet in the Hellespont at Cynossema is then defeated by an Athenian fleet commanded by Thrasybulus and Alcibiades.
Antiphon defends himself in a speech Thucydides describes as the greatest ever made by a man on trial for his life. Nevertheless, Antiphon is unable to persuade his accusers and he is executed for treason.
Alcibiades installs a garrison at Chrysopolis under Theramenes to exact a tithe from all shipping that comes from the Black Sea. This revenue enables the Athenians to put an end to the regime of the Five Thousand and restore their traditional institutions in full. Democracy is restored in Athens. The new demagogueCleophon dismisses peace overtures made by Sparta.
A relief decoration from the parapet (now destroyed), Nike (Victory) adjusting her sandal is constructed in the Temple of Athena Nike on the Acropolis in Athens and is ready in 407 BC. It is now preserved at the Acropolis Museum in Athens.