In 424 B.C. the contingent which the Thespians had been compelled to furnish sustained heavy losses at Delium, and in the next year the Thebans took advantage of this temporary enfeeblement to accuse their neighbours of friendship towards Athens and to dismantle their walls.
The tomb dates from the 5th century B.C., and is probably that of the Thespians who fell at Plataea, for those who fell at Thermopylae were buried on the field.