History of the Peloponnesian War

After this he embraced the first opportunity that offered of again leading them against the enemy. Now Nicias and the Athenians were of opinion that even if the Syracusans should not wish to offer battle, it was necessary for them to prevent the building of the cross wall, as it already almost overlapped the extreme point of their own, and if it went any further it would from that moment make no difference whether they fought ever so many successful actions, or never fought at all. They accordingly came out to meet the Syracusans.

Gylippus led out his heavy infantry further from the fortifications than on the former occasion, and so joined battle; posting his horse and darters upon the flank of the Athenians in the open space, where the works of the two walls terminated.

During the engagement the cavalry attacked and routed the left wing of the Athenians, which was opposed to them; and the rest of the Athenian army was in consequence defeated by the Syracusans and driven headlong within their lines.

The night following the Syracusans carried their wall up to the Athenian works and passed them, thus putting it out of their power any longer to stop them, and depriving them, even if victorious in the field, of all chance of investing the city for the future.