The First National Bank of Chicago was once a dominant corporate giant and a cornerstone of commercial banking in the American Midwest. During the wave of late-20th-century banking consolidation, it merged with NBD Bancorp to form First Chicago NBD Corporation, which was subsequently acquired by Bank One Corporation. Shortly thereafter, Bank One agreed to a massive multi-billion-dollar merger with JPMorgan Chase & Co., completely absorbing the historic First Chicago operations and brand into the national infrastructure of JPMorgan Chase.