 First Wisconsin made its first expansion move outside the state of Wisconsin in September 1986 by announcing the pending acquisition of Glen Ellyn-based Du Page Bancshares Inc. with its Du Page Bank & Trust Co. subsidiary for $18.2 million in stock.In October 1986, First Wisconsin announced the pending acquisition of the Naperville-based Naper Financial Corporation with its two subsidiary banks for $43 million in cash.In March 1987, First Wisconsin announced the pending acquisition of the Northbrook-based North Shore Bancorp Inc. with its Bank of the North Shore subsidiary for $6.16 million.