Having led the Indian independence movement, the Indian National Congress became the most popular political party in independent India and won every election following national independence in 1947. However, the Indian National Congress bifurcated in 1969 over the issue of the leadership of Indira Gandhi, the daughter of India's first prime minister Jawaharlal Nehru. Supporters of Indira Gandhi claimed to be the real Congress party, adopting the name Indian National Congress (R) – where "R" stood for "Requisition." Congress politicians who opposed Indira identified themselves as the Indian National Congress (O) – where "O" stood for "Organisation" or "Old." For the 1971 election, the Congress (O), Samyukta Socialist Party and the Bharatiya Jana Sangh had formed a coalition called the "Grand Alliance" to oppose Indira Gandhi and the Congress (R), but failed to have an impact; Indira's Congress (R) won a large majority in the 1971 elections and her popularity increased significantly after India's victory in the war of 1971 against Pakistan.