History of the Peloponnesian War

We have also discovered the changes in construction that we must make to meet theirs; and against the thickness of their cheeks, which did us the greatest mischief, we have provided grappling-irons, which will prevent an assailant backing water after charging, if the soldiers on deck here do their duty;

since we are absolutely compelled to fight a land battle from the fleet, and it seems to be our interest neither to back water ourselves, nor to let the enemy do so, especially as the shore, except so much of it as may be held by our troops, is hostile ground.