The 1918 World Series was the championship series of Major League Baseball, held from September 5 to September 11, 1918. It featured the Boston Red Sox and the Chicago Cubs. The Red Sox won the series in six games, clinching their sixth championship title. This World Series was notable for being played during World War I, which affected attendance and the overall atmosphere. The series was also the last one played before the introduction of the 1920 season, which saw significant changes in baseball, including the emergence of new stars and the eventual rise of the New York Yankees.