Bank One was a major financial institution in the United States, known for providing a range of banking services, including personal and commercial banking, investment services, and credit cards. Founded in 1998 through the merger of several banks, it quickly became one of the largest banks in the country, serving millions of customers. In 2004, Bank One was acquired by JPMorgan Chase, a leading global financial services firm. This acquisition allowed JPMorgan Chase to expand its presence in the Midwest and enhance its service offerings. Today, the legacy of Bank One continues as part of JPMorgan Chase's extensive banking network.