Chase Manhattan Bank was a major American bank formed in 1955 through the merger of Chase National Bank and The Manhattan Company. It became one of the largest financial institutions in the United States, offering a wide range of services including personal banking, investment banking, and asset management. In 2000, Chase Manhattan Bank merged with J.P. Morgan & Co. to create J.P. Morgan Chase & Co., which is now one of the leading global financial services firms. The bank serves millions of customers worldwide and plays a significant role in the global economy.