The Defence Industry refers to the sector that designs, produces, and maintains military equipment and technology. This includes weapons, vehicles, aircraft, and communication systems used by armed forces. Companies in this industry often work closely with governments to meet national security needs and ensure military readiness. In addition to manufacturing, the defence industry also involves research and development to innovate new technologies. This can include advancements in areas like cybersecurity, drones, and artificial intelligence. Key players in this field include major corporations such as Lockheed Martin, Northrop Grumman, and BAE Systems, which contribute significantly to global defence capabilities.