The Open began in 1860, and for many years it was not the most-followed event in golf, as challenge matches between top golfers were more keenly followed and drew larger crowds. The Great Triumvirate dominated the Open between 1894 and 1914 and were primarily responsible for the formation of the PGA in 1901 which had a big impact in promoting interest in professional golf (and therefore The Open) and increasing playing standards. Between the World Wars, the first wins by Americans were widely celebrated when they broke the dominance previously held by British players. After World War II, although the profile of the tournament remained high in the UK and Commonwealth countries, the low prize money compared the US events and the cost of travel meant fewer Americans participated. High-profile visits and wins by Ben Hogan and Arnold Palmer, the growth of cheaper and faster transatlantic flights, and the introduction of television coverage recovered its prestige. When the modern concept of the majors was cemented, the Open was included as one of the four events.