Introduction The Indian Space Research Organisation (ISRO) is renowned globally for its remarkable achievements in space exploration and satellite technology. Established in 1969, ISRO has evolved from its humble beginnings to become a prominent player in the field of space research and development. This article provides a comprehensive overview of the history of ISRO and its impacts on the Indian army and national security. The Early Years (1969-1979) ISRO was founded on August 15, 1969, with Dr. Vikram Sarabhai as its first chairman. During its formative years, ISRO focused primarily on satellite technology and launching vehicles. In 1975, ISRO successfully launched its first satellite, Aryabhata, into orbit. This marked the beginning of India's journey into space. The Satellite Revolution (1980s-1990s) The 1980s and 1990s witnessed significant progress for ISRO. In 1983, it launched the Rohini Satellite Series, which played a crucial role in meteorological, communication, and re...