Military fortifications are structures built to protect a military position from enemy attacks. They can include walls, trenches, bunkers, and towers, designed to provide defense and enhance the safety of soldiers and equipment. Fortifications have been used throughout history, adapting to advancements in weaponry and tactics. These structures often incorporate natural terrain features, such as hills or rivers, to strengthen their defenses. Famous examples of military fortifications include the Great Wall of China and Fort Knox. The design and construction of fortifications reflect the strategic needs of a particular time and place in military history.