Did Cornelius Vanderbilt have a monopoly?

Cornelius Vanderbilt did not have a monopoly in the strictest sense, but he did dominate key transportation industries during the 19th century, particularly in railroads and shipping. Through strategic consolidation and aggressive competition, he significantly increased his control over these sectors, especially with the New York Central Railroad. While he faced competition and regulatory challenges, his influence was substantial in shaping the transportation landscape of the time.