Air Raid Precautions (ARP) were measures taken to protect civilians during air raids, particularly in times of war. These precautions included the establishment of warning systems, the construction of shelters, and the organization of first aid services. Communities were trained to respond quickly to alerts, ensuring safety during potential attacks. ARP also involved public education campaigns to inform citizens about safety protocols, such as blackout procedures and evacuation routes. The goal was to minimize casualties and damage from aerial bombardments, especially during conflicts like World War II, when cities faced significant threats from enemy aircraft.