cockfighting and dominoes. The first horse track was built in San Juan in 1887. One of the most popular sports was "Boliche". The men would gather in the town plaza and roll a small ball made of wood with the objective of knocking down pins. "Boliche" was similar to bowling. Another popular sport was bullfighting, which was limited to the larger cities of Ponce and San Juan. American (United States) colonization In the late 19th century "new" sports were introduced in Puerto Rico, after Puerto Rico became an American territory when the United States defeated Spain in the Spanish–American War. Baseball, which was invented in the United States, was introduced to the island by a group of Puerto Ricans and Cubans who learned the sport in the United States. The sport was also played by the American soldiers who organized games as part of their training. Puerto Ricans were also introduced to the sports of boxing and basketball by the occupying military forces. Modern era Puerto Rico and Puerto Ricans in the Olympic Games Puerto Rico participates in the Olympics as an independent nation but because of Puerto Ricans having American citizenship, Puerto Rican athletes have the option of representing Puerto Rico or moving to the United States, living there for 3 previous years or more and then representing that country in the games. Some Puerto Ricans, such as Gigi Fernández in tennis, have won gold medals for the U.S. The 1948 Summer Olympics celebrated in London, was a historical one for Puerto Rico because it was the first time that the island would participate as a nation in a major international sporting event. The island's delegation consisted of only three members, two of which finished among the ten best in pole vault. In their regional participations, the Puerto Ricans had carried the United States flag into the games. The United States protested, claiming that two nations could not use the same flag at the same time. The decree of Commonwealth on July 25, 1952 would give the Puerto Rican delegation a flag of their own. In 1980, the United States boycotted the Olympic Games in Moscow, Russian SFSR, USSR in protest of the Soviet invasion of Afghanistan. Germán Rieckehoff, who was then the president of the Puerto Rican Olympic Committee, was against the boycott because he believed that politics should not get involved with sporting events. He was, therefore,