Allies hold the pass at Thermopylae as the king comes south
Reconstructed from historical sources
The Greek allies hold the pass at Thermopylae and the strait off Artemisium as the Persian king comes down into Thessaly.

THERMOPYLAE.—The Greek allies stand across the Persian king’s road. Leonidas, king of Sparta, holds the pass at Thermopylae with the allied army, and the allied fleet lies close by off Artemisium.
The army broke up from the Isthmus with all speed on word that the king was in Pieria, and has now reached the pass and dug in. The two stations are so near each other that each can have word of what the other is doing.
The allied council chose the place itself. It judged this pass narrower than the way into Thessaly and nearer home, and found on a survey that here the king could use neither his whole army nor his horsemen.
if on men’s valour, then this number will doLeonidas
At its narrowest the road is fifty feet wide. A high, sheer spur of Oeta rises on one side; on the other there is nothing but marsh and sea. Here are the warm springs called the Basins, and an altar of Heracles.
Across the road the men have built up again the old wall the Phocians once raised against the Thessalians, mostly in ruins until now, to bar the foreigner’s way into Hellas. For food they look to the village of Alpeni, close by the road behind them.
Leonidas, son of Anaxandrides, has brought the appointed three hundred, men he picked himself, all of them men with sons.
Beside the Spartans stand 700 Thespians, 400 Thebans, 400 Corinthians and men from all over Arcadia, with others from the Peloponnese.
Someone in the camp asked Leonidas whether he meant to run so great a risk with so few men against so many. If he trusted in numbers, he answered, all Greece would not suffice, being but a small part of the enemy’s host; “if on men’s valour, then this number will do.”
Herodotus, Histories, book 7, tr. A. D. Godley (Loeb, 1920; modernised by Perseus) · Plutarch, Sayings of Spartans, in Moralia, tr. F. C. Babbitt (Loeb, 1931).


