A tunnel through the mountain between the Fucine Lake and the river Liris had now been competed. To enable a large crowd to see this impressive achievement a naval battle was staged on the lake itself, like the exhibition given by Augustus on his artificial lake adjoining the Tiber, though his ships and combatants had been fewer. Claudius equipped warships manned with nineteen thousand combatants, surrounding them with a circle of rafts to prevent their escape. Enough space i