That very night the land army of the barbarians began marching to the +Peloponnese [22,37.5] (region), Greece, Europe Peloponnese. Yet every possible device had been used to prevent the barbarians from invading by the mainland. As soon as the Peloponnesians learned that Leonidas and his men at +Thermopylae [22.5583,38.8] (Perseus) Thermopylae were dead, they ran together from their cities and took up their position at the Isthmus. Their general was Cleombrotus son of Anaxandrides, the brother of Leonidas.

When they were in position at the Isthmus, they demolished the Scironian road and then, after resolving in council, built a wall across the Isthmus. Since there were many tens of thousands and everyone worked, the task was completed, as they brought in stones and bricks and logs and baskets full of sand. At no moment of the day or night did those who had marched out there rest from their work.