An authentic description of development of Defence R&D in India and the first of its kind which traces the origin of military research. The book describes the development of Defence R&D in India, which traces the origin of military research, its need under British rule in India in early 20th century, the R&D done during two world wars, the independent India, and defence strategy at that time. It describes in detail the inception of Defence Research Organisation and the development of labs and R&D activities till 1982.