One example he gives of control of river water during a siege reads: Lucius Metellus, when fighting in Hither Spain, diverted the course of a river and directed it from a higher level against the camp of the enemy, which was located on low ground.
Salah satu contoh, dia memberikan kontrol air sungai selama pengepungan berbunyi: Lucius Metellus, ketika pertempuran di Mari Spanyol, dialihkan saja dari sungai dan diarahkan dari tingkat yang lebih tinggi terhadap kamp musuh, yang terletak di tanah yang rendah.