Forts are defensive structures that have been used for centuries to protect people and their possessions. They are typically built from stone, brick, or wood and are designed to withstand attack from enemies. Forts can be found in many different shapes and sizes, ranging from small castles to large fortresses. They often feature high walls, towers, and other defensive features such as moats, drawbridges, and gun emplacements. Forts have been used throughout history to protect cities, towns, and other important locations from attack.