In the early 20th century, with the start of
Swadeshi movement, Allahabad Bank witnessed a spurt in deposits. In 1920,
P & O Banking Corporation acquired Allahabad Bank with a bid price of per share. In 1923 the bank moved its head office and the registered office to Calcutta for reasons of both operational convenience and business opportunities. Then in 1927
Chartered Bank of India, Australia and China (Chartered Bank) acquired P&O Bank. However, Chartered Bank continued to operate Allahabad Bank as a separate entity. Allahabad Bank opened a branch in Rangoon (
Yangon). At some point, Chartered Bank amalgamated Allahabad Bank's branch in Rangoon with its own. In 1963 the
revolutionary government in Burma nationalized the Chartered Bank's operations there, which became People's Bank No. 2. On 19 July 1969, the Indian government nationalised Allahabad Bank, along with 13 other banks. In October 1989, Allahabad Bank acquired
United Industrial Bank, a Calcutta-based bank that had been established in 1940 and that brought with it 145 branches. Two years later, Allahabad Bank established AllBank Finance Ltd, a wholly owned
merchant banking subsidiary. ==21st century==