After the boycott of 1904, the World Series was played every year until 1994 despite World War I, the global influenza pandemic of 1918–1919, the Great Depression of the 1930s, America's involvement in World War II, and even an earthquake in the host cities of the 1989 World Series. A breakdown in collective bargaining led to a strike in August 1994 and the eventual cancellation of the rest of the season, including the playoffs.