Menon had his early education in Tellicherry.He took his B.A. degree from Madras Presidency College.While in College, he started taking an active interest in the national movement.While studying in the Madras Law College, he became actively associated with Annie Besant and the Home Rule Movement.He was a leading member of the 'Brothers of Service', founded by Annie Besant who spotted his gifts and sent him to England in 1924.
Krishna Menon became a member of the Rajya Sabha in 1953.On February 3, 1956, he joined the Union Cabinet as Minister without Portfolio.In 1957 he was elected to the Lok Sabha from Bombay and in April of that year, hebecame Defence Minister.He worked tirelessly to modernise the defence forces and initiated a number if measures of far-reaching significance.
Krishna Menon resigned from the Cabinet in 1962, soon after the Chinest aggression.But he continued his activities on the national and international planes. He passed away on October 6, 1974.