A cannonball is a solid projectile that was historically used in cannons and artillery. Made of metal, these spherical balls were designed to be fired at high speeds to cause damage to enemy fortifications or troops during battles. The use of cannonballs became prominent in the 15th century and continued until the 19th century, when more advanced weaponry was developed. Cannonballs were typically made of iron or lead and varied in size and weight. They were often used in warfare, particularly during the American Civil War and Napoleonic Wars. Today, cannonballs are often found as historical artifacts and are studied for their role in military history.