The mounted knights formed the heavy cavalry; we might think of them as armored divisions. Battles in the open field lasted a single day and if possible were fought in good weather. Tactics were simple; the knights in squadrons (usually of ten) charged with lances set, followed by hand-to-hand combat. Knights required a team of squires and servants to assist them in arming and to care for armor and weapons. They also needed a stable of horses—the huge specially trained war horses known as the destriers, but also riding horses and pack animals. The goal of a warrior was not to kill but to capture and hold his enemy for ransom and to acquire the enemy’s valuable armor, horses, and other loot. Military men made their living by capturing and ransoming prisoners and looting the battlefield and countryside. Capture, not killing, paid off.