State Bank of India (SBI) is the largest bank in India, with over 22,000 branches and over 200 million customers. SBI was formed in 1955 by the government of India after nationalizing the Imperial Bank of India. SBI traces its origins back to 1806 and three presidency banks formed during British rule in India. In 2017, SBI merged with five of its associate banks and the Bharatiya Mahila Bank to form a "mega bank" and become one of the top 50 largest banks globally by assets and deposits. SBI provides a wide range of banking and financial services both domestically in India and internationally through nearly 200 overseas offices.