classification shift from a points system to a time based system. In the new system, every rider's finishing time for each stage is totaled together and the rider with the lowest total time is the overall leader. Out of the eighty-one riders entered the race only eight of them finished. The grueling race was won by Alfonso Calzolari, who won by almost two hours over the second-place finisher. A Giro was planned for 1915, but the plans were scrapped when Italy entered World War I. After the Great War ended, the race resumed in 1919. This edition of the race navigated through the ruined parts of Northern Italy, which made it hard for the organizers and riders. Costante Girardengo — the eventual winner — became the first rider to lead the Giro from start to finish. En route to winning overall, Girardengo won seven of the ten stages that composed the event. In addition, the Belgian Marcel Buysse became the first foreigner to finish on the podium; Buysse finished third overall, over an hour slower than Girardengo. The following year's Giro began with close to fifty riders and finished with ten. The first stage of the 1920 Giro d'Italia briefly went into Switzerland, which was the first time that the Giro had ever left its home country of Italy. Girardengo came into the race the favorite, but injuries sustained from crashing in the second stage forced him to withdraw. During the second stage, Gaetano Belloni capitalized on Girardengo's, race leader Giuseppe Olivieri's, Carlo Galetti's withdrawal to win the second stage and take the lead. Belloni, known by many as "the Eternal Second, went on to win the Giro and proved he could win a race. Costante Girardengo won the first four stages of the 1921 Giro d'Italia and was leader after the fourth day. During the fifth stage, Girardengo was involved in a crash, and when Gaetano Belloni saw this, he attacked. Girardengo chased for before quitting. Belloni was then the new leader after stage 5's conclusion. After the fifth stage, Giovanni Brunero was the only rider close to Belloni. Brunero attacked during the race's seventh stage to win the day and take the overall lead by fifty-two seconds, which proved enough to last until the race's conclusion in Milan. The 1922 Giro d'Italia saw some controversy amongst the general classification contenders. In the race's first stage, Giovanni Brunero received