History of the Peloponnesian War

So when this proclamation had been made, and they had reconnoitred the city, the harbours, and the features of the country which they would have to make the base of their operations in the war, they sailed back again to Catana.

An assembly having been held there, the inhabitants did not admit the armament, but told the generals to come in and say what they wished. While Alcibiades was speaking, and the attention of those in the city was turned to the assembly, the soldiers, without being observed, broke through a postern which had been ill built up in the wall, and entering the city stationed themselves in the market-place.