Third Sacred War
The Third Sacred War (356–346 BC) was fought between the forces of the Delphic Amphictyonic League, principally represented by Thebes, and latterly by Philip II of Macedon, and the Phocians. The war was caused by a large fine imposed in 357 BC on the Phocians by the Amphictyonic League (dominated at that moment by Thebes), for the offense of cultivating sacred land; refusing to pay, the Phocians instead seized the Temple of Apollo in Delphi, and used the accumulated treasures to fund large mercenary armies. Thus, although the Phocians suffered several major defeats, they were able to continue the war for many years, until eventually all parties were nearing exhaustion. Philip II used the distraction of the other states to increase his power in northern Greece, in the process becoming ruler of Thessaly. In the end, Philip's growing power, and the exhaustion of the other states, allowed him to impose a peaceful settlement of the war, marking a major step in the rise of Macedon to pre-eminence in Ancient Greece.
Sacred Band of Thebes
The Sacred Band first saw action in 378 BC, at the beginning of the Boeotian War. It was during the famous stand-off between the Athenian mercenary commander (and later "strategos") Chabrias (d. 357 BC) and the Spartan King Agesilaus II (444 BC–360 BC). Prior to the creation of the Sacred Band under Gorgidas, the Athenians had helped the Theban exiles retake control of Thebes and the citadel of Cadmea from Sparta. This was followed by Athens openly entering into an alliance with Thebes against Sparta. In the summer of 378 BC, Agesilaus led a Spartan expedition against Thebes from the Boeotian city of Thespiae (then still allied to Sparta).