History of the Peloponnesian War

Thucydides

Thucydides. The history of the Peloponnesian War, Volume 1-2. Dale, Henry, translator. London: Heinemann and Henry G. Bohn, 1851-1852.

which indeed was the only way they could.

But when he thought there was a dilatoriness on their part, he himself made the right wing turn round, and presenting their exposed side to the enemy, began to lead off his troops. Upon this, Brasidas, marking his opportunity, and seeing that the Athenian force was on the move, says to his own company and the rest:

The men are not disposed to wait for us, as is evident by the motion of their spears and of their heads; for those who have this going on amongst them do not generally receive the charge of their assailants.

So then let somebody throw open for me the gates I have mentioned, and let us march out against them as quickly as possible, and with good courage.
He, accordingly, sallied out by the gates near the stockade, the first in the long wall which was then standing, and ran full speed along the high road, where the trophy now stands, as you go by the strongest part of the position;