The National Democratic Alliance (NDA) is a coalition of political parties in India, formed in 1998. It was established to provide a united front for various parties that share similar ideologies, primarily focusing on nationalism and economic development. The NDA has been led by the Bharatiya Janata Party (BJP), which is one of the major political parties in India. The NDA has played a significant role in Indian politics, especially during elections. It aims to promote policies that foster economic growth, social welfare, and national security. The coalition has seen various parties join and leave over the years, reflecting the dynamic nature of Indian politics.