An arsenal is a facility or location where weapons, ammunition, and military equipment are stored, maintained, and sometimes manufactured. These establishments are crucial for national defense, ensuring that armed forces have the necessary resources to operate effectively. Arsenals can vary in size and function, ranging from small depots to large military complexes. They may also include research and development facilities for creating new weapons technology. Notable examples include the United States Army Arsenal and the Royal Arsenal in Woolwich, which played significant roles in military history.