Siege Weapons and Fortifications
A siege engine is a weapon used to destroy fortifications such as defensive walls, castles, bunkers and fortified gateways. A fortification (also called a fort, fortress, fastness, or stronghold) is a military construction designed for the defense of territories in warfare, and is used to establish rule in a region during peacetime. The term is derived from Latin fortis ("strong") and facere ("to make").[1]