Harley-Davidson found in 1903 and by 1970 had survived four crises brought on by external events. The company 29,000 motorcycles in 1920. However, output quickly dropped to 10,000 purchasing as the economy softened and Americans turned to the auto far basic vehicles. About the time rebounded to previous levels, the Great Depression struck, and production sunk to 3,700 units. World War II brought renewed demand-which ended with the war. Finally, postwar sales surged to record levels on the strength of the transportation power of returning veterans, only to slack off once again