Cannonballs are solid projectiles that were historically used in cannons, a type of artillery. Made from materials like iron or stone, they were designed to be fired at high speeds to damage enemy fortifications or troops during battles. The shape of a cannonball is typically spherical, which helps it maintain stability and accuracy when launched. The use of cannonballs dates back to the 14th century and continued into the 19th century, evolving alongside advancements in military technology. They were often used in warfare by various armies, including those of Napoleon Bonaparte and during the American Civil War. Today, cannonballs are often found as historical artifacts in museums.