In the contemporary era, technology has seen a rapid growth, typically in defence agencies, government corporations, artificial intelligence, cyber crimes, military surveillance and satellite. Today the threat of terrorism and proliferation are the greatest ones to our security. Transformative impact of surveillance technology has been witnessed globally in areas including legislation, cultural norms, and advancements. This paper essentially explores the multifaceted ways in which technology is employed for defence purposes explaining its pivotal role in enhancing strategic intelligence and crisis response capabilities. It emphasizes legislative measures, technological safeguards and collaborative efforts to strike a balance between the positive effects on technology and its protection on individual rights. The study also takes into account the difficulties associated with cross-border data exchange, societal ramifications, and regional differences when implementing surveillance techniques. It also indicates how crucial technology is in the contemporary world as military plans, stressing on the manner in which it protects people, secures borders, and upholds national sovereignty in the world in which it is evolving and becoming more interconnected and complex. To conclude, the researchers are trying to signify the need to navigate the future of advanced technology by considering ethical guidelines and implications for individual privacy and social structures.