MIDDLEFIELD,Ohio & BEACHWOOD, Ohio--(BUSINESS WIRE)--Middlefield Banc Corp. ("Middlefield", the "Bank", or the "Company") (NASDAQ: MBCN), the bank holding company for The Middlefield Banking Company, and Liberty Bank, N.A. ("Liberty") today announced Middlefield has entered into an Agreement and Plan of Reorganization (the "Agreement") with Liberty. Under the terms of the Agreement, Liberty shareholders will have the option to receive either 1.1934 shares of MBCN stock or $37.96 in cash in addi