 In Europe, they acquired the Swiss-German firm Unternehmensberatung Munchen in 1993, French firm Marketing Innovation Design pour l'industrie in 1995 and Corporate Decisions, Inc., a firm founded by ex-Bain & Company partners that operated in the US, UK, and France in 1997.Mercer became the world's largest benefit consultant with one billion dollars in 1997 revenue, and much of their growth was attributed to these acquisitions.This pattern of growth by acquisition has continued to the present day, with Oliver Wyman or its predecessors acquiring more than 20 firms in the 21st century.