Chemical, Biological, Radiological, and Nuclear Defense (CBRND) refers to the strategies and measures taken to protect individuals and communities from harmful agents. This includes chemicals that can cause poisoning, biological agents like viruses and bacteria, radiological threats from radioactive materials, and nuclear weapons. The goal is to prevent, respond to, and recover from incidents involving these dangerous substances. CBRND involves various practices, including detection, decontamination, and medical treatment. Training and preparedness are essential for emergency responders and military personnel to effectively manage potential threats. Public awareness and education also play a crucial role in enhancing community resilience against CBRND incidents.