Aetolian League in the context of "First Macedonian War"

The Lamian War or the Hellenic War (323–322 BC), was an unsuccessful attempt by Athens and a large coalition of Greek states to end the hegemony of Macedonia over Greece just after the death of Alexander the Great. It was the last time Athens played a significant role as an independent power.

War was simmering in Greece after Alexander the Great issued the Exiles' Decree (in 324 BC), which ordered the Greek states to return all the people they had forced into exile. This decree meant that Athens had to surrender the island of Samos, colonised by Athenian clerurchs since 365 BC, while the Aetolian League had to leave Oiniadai, taken c.330 BC. Once the death of Alexander became known in June 323 BC, most states in mainland Greece revolted and founded the Hellenic League, recalling the alliance forged during the Persian Wars; this time with Macedonia in the role of the foreign invader. The Greeks were initially successful under their Athenian commander in chief Leosthenes, who managed to besiege Antipater, the Macedonian general in Europe, in the city of Lamia, which gave its name to the war. At this point however, the arrival of a large Macedonian fleet commanded by Cleitus the White from the Levant turned the tide in favour of Macedonia. Even though Athens had more ships than Macedonia, it did not have enough crews to man them all and its overextended navy was defeated off the Echinades island and Amorgos.

The Achaean League (Ancient Greek: Κοινὸν τῶν Ἀχαιῶν, romanized: Koinon ton Akhaion, lit. 'League of Achaeans') was a Hellenistic-era confederation of Greek city-states on the northern and central Peloponnese. The league was named after the region of Achaea in the northwestern Peloponnese, which formed its original core. The first league was formed in the fifth century BC. Although the first Achaean League is much less well documented than its later revival, it maintained a recognizable federal structure through the early Hellenistic period, but later fell into a period of dormancy under growing Macedonian influence. The more famous second Achaean League was established in 280 BC. First it was an ally of Antigonid Macedon at the Cleomenean War, Social War and First Macedonian War and a rival of the Aetolian League and Sparta. As a rival of Antigonid Macedon and an ally of the Roman Republic since the Second Macedonian War, the league played a major role in the expansion of Rome into Greece. This process eventually led to the League's conquest and dissolution by the Romans in 146 BC.

The League represents the most successful attempt by the Greek city-states to develop a form of federalism, which balanced the need for collective action with the desire for local autonomy. Through the writings of the Achaean historian and statesman Polybius, this structure has had an influence on the constitution of the United States and other modern federal states.

Hellenistic Greece is the historical period of Ancient Greece following Classical Greece and between the death of Alexander the Great in 323 BC and the annexation of the classical Greek Achaean League heartlands by the Roman Republic. This culminated at the Battle of Corinth in 146 BC, a crushing Roman victory in the Peloponnese that led to the destruction of Corinth and ushered in the period of Roman Greece. Hellenistic Greece's definitive end was with the Battle of Actium in 31 BC, when Octavian defeated Ptolemaic queen Cleopatra VII and Mark Antony, the next year taking over Alexandria, the last great center of Hellenistic Greece.

The Hellenistic period began with the wars of the Diadochi, armed contests among the former generals of Alexander the Great to carve up his empire in Europe, Asia, and North Africa. The wars lasted until 275 BC, witnessing the fall of both the Argead and Antipatrid dynasties of Macedonia in favor of the Antigonid dynasty. The era was also marked by successive wars between the Kingdom of Macedonia, the kingdom of Epirus, the Aetolian League, Achaean League, Sparta, Rhodes, kingdom of Pergamum as well as the Seleucid and Ptolemaic empires.

Epirus (/ɪˈpaɪrəs/; Epirote Greek: Ἄπειρος, Ápeiros; Attic Greek: Ἤπειρος, Ḗpeiros) was an ancient Greek kingdom, and later republic, located in the geographical region of Epirus, in parts of north-western Greece and southern Albania. Home to the ancient Epirotes, the state was bordered by the Aetolian League to the south, Ancient Thessaly and Ancient Macedonia to the east, and Illyrian tribes to the north. The Epirote king Pyrrhus is known to have made Epirus a powerful state in the wider Hellenistic world (during 297–272 BC) that was comparable to the likes of Macedon and Ancient Rome. Pyrrhus' armies also attempted an assault against the state of Ancient Rome during their unsuccessful campaign in what is now modern-day Italy.

The Battle of Thermopylae took place on 24 April 191 BC. It was fought as part of the Roman–Seleucid War, pitting forces of the Roman Republic led by the consul Manius Acilius Glabrio against a Seleucid-Aetolian army of Antiochus III the Great.

When the main bodies of the armies initially clashed at the Thermopylae pass, the Seleucids managed to hold their ground, repulsing multiple Roman assaults. However, a small Roman force under Marcus Porcius Cato managed to outflank the Seleucids from the hillside after surprising the Aetolian garrison of Fort Callidromus. The Seleucids panicked and broke ranks, leading to the destruction of their force. Antiochus managed to escape the battlefield with his cavalry, departing mainland Greece soon afterwards.

The Second Macedonian War (200–197 BC) was fought between Macedon, led by Philip V of Macedon, and Rome, allied with Pergamon, Rhodes and the Aetolian League. Philip was defeated and was forced to abandon all possessions in southern Greece, Thrace and Asia Minor. During their intervention, although the Romans declared the "freedom of the Greeks" against the rule from the Macedonian kingdom, the war marked a significant stage in increasing Roman intervention in the affairs of the eastern Mediterranean, which would eventually lead to Rome's conquest of the entire region.

The Antigonid Macedonian army was the army that evolved from the ancient Greek kingdom of Macedonia in the period when it was ruled by the Antigonid dynasty from 276 BC to 168 BC. It was seen as one of the principal Hellenistic fighting forces until its ultimate defeat at Roman hands at the Battle of Pydna in 168 BC. However, there was a brief resurgence in 150-148 during the revolt of Andriscus, a supposed heir to Perseus.

Starting as just a mere handful of mercenary troops under Antigonus Gonatas in the 270s BC, the Antigonid army eventually became the dominant force in Hellenistic Greece, fighting campaigns against Epirus, the Aetolian League, Sparta, Athens, Rhodes and Pergamon, not to mention the numerous Thracian and Celtic tribes that threatened Macedon from the north.

Aetolia (Greek: Αἰτωλία, romanized: Aitōlía) is a mountainous region of Greece on the north coast of the Gulf of Corinth, corresponding to the eastern part of the modern regional unit of Aetolia-Acarnania. Ancient Aetolia was the core of the Aetolian League and also included parts of modern Evrytania.

The Social War, also War of the Allies and the Aetolian War, was fought from 220 BC to 217 BC between the Hellenic League under Philip V of Macedon and the Aetolian League, Sparta and Elis. It was ended with the Peace of Naupactus.