He was a leading light in the Indian nationalist movement. He represented India at the United Nations 1952-62, and was defence minister 1957-62, when he was dismissed by Nehru following China's invasion of N India. He was barrister of the Middle Temple in London, and Labour member of St Pancras Borough Council 1934-47. He was secretary of the India League in the UK from 1929, and in 1947 was appointed Indian high commissioner in London. He became a member of the Indian parliament 1953, and minister without portfolio 1956. He was dismissed by Nehru 1962 when China invaded India after Menon's assurances to the contrary.