Defensive systems are strategies and technologies designed to protect individuals, organizations, or nations from various threats. These systems can include physical barriers, surveillance equipment, and cybersecurity measures. Their primary goal is to detect, deter, and respond to potential dangers, ensuring safety and security. In military contexts, defensive systems may involve missile defense systems, fortifications, and intelligence gathering. In cybersecurity, they encompass firewalls, encryption, and intrusion detection systems. Overall, defensive systems play a crucial role in safeguarding assets and maintaining stability in various environments.